_In the seventh and last place, geology has given great enlargement to our knowledge of the divine plans and operations in the universe, and in the following particulars_:--

1. It expands our ideas of the time in which the material universe has been in existence as much as astronomy does in regard to its extent.

To those not familiar with the details of geology, this will probably seem a startling and extravagant a.s.sertion. There has been, and still is, an extreme sensitiveness in the minds of intelligent men on this subject. And I highly respect the ground from which their apprehensions spring, viz., a fear that to admit the great antiquity of the globe would bring discredit upon revelation. And yet I believe the most candid and able theologians of the present day do not fear that to admit the existence of the matter of the world previous to the six days' work of creation, is inconsistent with the Mosaic statement. But if we allow any period between its creation and the six demiurgic days, it is no more derogatory to Scripture to make that period ten millions of years than ten years. For if the sacred writer would pa.s.s over ten years in silence, he could, with the same propriety, pa.s.s over ten millions. Now, the longer I study geology, the nearer do my ideas approximate to the latter number as a measure of the earth's duration. Let us contemplate a few facts. We are able to trace the geological changes that have taken place on the earth since man's existence upon it with a good deal of accuracy. For since his remains are found only in alluvium, we must regard all changes that took place previous to the deposition of that formation to have been of an earlier date than his creation. Now, what are the changes which the last six thousand years have witnessed? In some places, the agency of rivers and other causes have made an acc.u.mulation of alluvial matter to the depth of not more than one or two hundred feet, although in particular places it is several hundred feet. These deposits have been pushed forward at the mouths of some large rivers, so as to cover hundreds, and even thousands, of square miles. Oceanic currents have also made deposits in the bottom of wide seas of considerable extent; and in some limited spots these deposits have been consolidated into rock. The action of frost and gravity, also, has crumbled from precipitous ledges angular fragments enough to form a slope of detritus sometimes a hundred feet high. The polyparia, or coral builders, have advanced their work only a few feet in thickness during this period, and soils have acc.u.mulated in some places about as much. Volcanic action has occasionally thrown up a new island from the ocean's bed; but only a few of them have been permanent. Some tracts of country, in no case more than a few hundred miles in extent, have, by the same agency, been raised a few feet, or sunk down the same amount. But after all, the earth's surface remains essentially the same as when man was placed upon it.

Now, compare these slight changes with those which have preceded it, through the operation of the same agencies, since the first existence of animals upon the globe. I will not contend, with some distinguished geologists, that these same changes have always operated with the same intensity as at present. But there are several circ.u.mstances which show that the depositions from water could not have been essentially different in ancient and modern times. Now, just compare six or eight miles in thickness of the fossiliferous deposits of the previous periods with the two hundred feet of alluvium acc.u.mulated during the historic period; and, after you have made all reasonable allowance for the greater intensity of action in former times, you will still find yourselves confounded by the incalculable time requisite to pile up such an immense thickness of materials, and then to harden most of them into stone; especially when you call to mind the numerous changes of organic life, and the vast amount of animal remains which they exhibit. A superficial observer might lump such a work, and crowd it into a few thousand years. But the more its details are studied, the longer does the period appear that is requisite for its production. Each successive investigation discovers new evidence of changes in composition, or organic contents, or of vertical movements effected by extremely slow agencies, so as to make the whole work immeasurably long.

But when we have gone back to the commencement of animal existence on the globe, we have taken but one step in our review of its early history. The next backward step embraces that wide period during which the stratified, non-fossiliferous rocks--far thicker than the fossiliferous--were deposited; probably by the agency of fire and water. Or if we adopt the metamorphic theory of Mr. Lyell, we shall be still more deeply impressed by the length of that period, during which these rocks were in a course of deposition, consolidation, and metamorphosis. For he supposes them originally deposited from water, just as mud, sand, and gravel now are acc.u.mulating in the ocean's bed, and to have enveloped organic beings, as similar materials now do. Next the whole were consolidated, so as to form the exact prototype of the existing fossiliferous rocks; and finally it underwent almost complete fusion, by the slow propagation of internal heat upwards, until all the organic contents were obliterated, and a crystalline structure was subst.i.tuted. Nay, according to this theory, other systems of rocks, of an a.n.a.logous character, may have preceded the present primary stratified ones, and have been at length entirely melted into the unstratified; so that we cannot say when organic life first began on the globe. But I will not press this theory, because most of the ablest geologists reject it, at least in its full extent. And we have a period long enough to confound the imagination, if we take the common view, which supposes the non-fossiliferous rocks to have been deposited from water, at a temperature too high to admit the existence of organic beings.

We have now gone back to that point in the earth's history when a crust had begun to form over the sh.o.r.eless ocean of melted matter, of which we have reason to suppose it was then composed. Shall we attempt to trace back that history any farther? The light does, indeed, grow dim, and the clew more and more uncertain, the farther we recede along the track of the earth's existence. Still there are some scattered rays that seem to recall to us a condition of the earth still earlier than that in which it const.i.tuted a molten globe. It may have been dissipated into vapor, like a comet, or a nebula; and subsequently, by the slow radiation of its heat, have been condensed into an opaque, though a melted, incandescent ma.s.s.

Several a.n.a.logies certainly throw an air of plausibility over this hypothesis. And if such was, indeed, the earliest condition of the earth, the time requisite to condense it into melted matter must have been longer than any other period of its history.

Who, now, at all familiar with the dynamics of geological agencies, shall undertake to give an arithmetical expression to the periods that make up the world's entire history? Not only does the reasoning faculty fail to grasp the entire sum, but even imagination, as she flies backwards through period after period, tires in the effort, and brings back not even a conjectural result. The same feeling does, in fact, come over the mind, which she experiences when astronomy has hurried her from world to world, from sun to sun, from system to system, from nebula to nebula, and yet she seems no nearer to the limits of creation than when she started. We know certainly that there are limits; because matter cannot be infinite. But we cannot conjecture where they are fixed. We know, also that there was a time when this world did not exist, an epoch when its entire ma.s.s was spoken into existence by the fiat of Jehovah; because the Bible expressly declares it. But that epoch is unrevealed. If there is any truth in geology, it was certainly more than six thousand years ago. Nay, that science carries us as far back into the arcana of time as astronomy does into the arcana of s.p.a.ce. Neither the distance in the one case, nor the duration in the other, can be estimated. But there is a sublime inspiration in the effort to grasp the subject; and I see not why there is not as much grandeur and high gratification in the idea of vast duration as of vast expansion. And I see not why we do not gain as much enlargement of our conceptions of the plans of Jehovah respecting the universe in the one case as in the other. We cannot but infer, from the pre-Adamic state of our world, that it must have subserved other purposes than to sustain its present inhabitants.

2. In the second place, geology gives us impressive examples of the extent of organic life on the globe since its creation.

I shall not contend, with some geologists, that even the primary crystalline rocks may once have been filled with organic remains, which have been obliterated by heat; and that, in this way, there may have been a number of creations of organized beings on the globe, of which no trace now remains. I take as the basis of my argument only the relics of animals and plants actually found in the rocks. And when one sees mountain ma.s.ses, often of small sh.e.l.ls, and spread over wide areas, he is amazed to learn how prolific nature has been. What a countless number of vegetables, too, must have been required to produce beds of coal from one to fifty feet thick, and extending over thousands of square miles, and alternating several times with sandstone in the same basin! There is reason to believe, too, that the number of animals preserved in the strata bears only a small proportion to those which have been utterly destroyed and decomposed into their original elements. For example, in the sandstone along Connecticut River, the tracks of more than forty species of bipeds and quadrupeds have been found most distinctly marked. Some of these bipeds must have been of colossal size--as much as twelve or fifteen feet in height. And yet scarcely any other vestige of their existence has been discovered. They were the giant rulers of that valley for centuries; but they have all vanished. How numerous, then, may have been the softer animals of the ancient world, which have not left even a footmark to certify their existence to coming generations!

But the facts recently brought to light respecting infusoria and polythalamia fill us with the greatest admiration of the extent of organic life upon the globe. We have already seen that some of these animals are so minute that eight millions of them are found in a s.p.a.ce not larger than a mustard-seed; and yet they had skeletons of silex, lime, and iron; and, of course, these skeletons have been preserved; and, though of the smallest size, it requires not less than forty-one billions to make a single cubic inch; yet deposits of them, or of species not much larger, occur, several feet in thickness, and extending over several square miles.

Nay, the chalk of Northern Europe, and also of Western Asia, where it const.i.tutes most of Mount Lebanon, and extends southerly through Palestine into Arabia and Egypt, and also deposits in North and South America, thousands of miles in extent,--this rock, I say, is nearly half composed of microscopic sh.e.l.ls. The olite, also, contains them; and, indeed, infusorial remains occur in flint and opal; and, as instruments and observations are perfected, more and more of the solid rocks are found to have once const.i.tuted the framework of animals. It is hardly to be doubted that such was the fact with nearly all the limestone on the globe, occupying at least a seventh part of its surface. In fact, we seem fast coming to regard as sober truth the ancient adage, apparently so extravagant--_Omnis calx e vermibus; omne ferrum e vermibus; omnis silex e vermibus._ Indeed, it is the opinion of so competent a geologist as Dr.

Mantell that "probably there is not an atom of the solid materials of the globe which has not pa.s.sed through the complex and wonderful laboratory of life."--_Wond. of Geology_, vol. ii. p. 670.--What a vast field here opens before us to contemplate the far-reaching plans, the benevolence, and the wisdom of the Deity!

In the third place, geology shows us that the present system of organic life on the globe is but one link of a series, extending very far backward and infinitely forward.

Revelation describes only the existing species, leaving to science the task and the privilege to lift up the veil that hangs over the past, and to disclose other economies that have pa.s.sed away. How many of them have existed we do not certainly know. If, with Aga.s.siz, we characterize them by their predominant tribes, we might say that all the period previous to the new red sandstone const.i.tuted the reign of fishes; from thence to the chalk, the reign of reptiles; from thence to the drift, the reign of mammifera. But this is a less philosophical view than that of Deshayes, who finds five great groups of animals, specifically independent of one another. But who will attempt to fix the chronological limits of these systems? We can only say that they must have been exceedingly long, if we can place any dependence upon existing a.n.a.logies; and we know that each one of them is made up of numerous subdivisions, or minor groups, widely, though not entirely, different in composition and organic contents. We know that the more we examine the whole series, the deeper does our conviction become that its commencement runs back far, very far, into the depths of past eternity. We know, also, from the joint testimony of Scripture and geology, that another change is to pa.s.s over the world, to prepare it for inhabitants far more elevated than those now living upon it, and in possession of perfect holiness and perfect happiness. And it may be it will experience far greater changes, adapting it for higher and higher grades of being, through periods of duration to which we can a.s.sign no limits. O, what a vast chain of being is here spread out before the imagination, reaching immeasurably far into the depths of the eternity which is past, and into the eternity which is to come! What a field for the display of G.o.d's infinite perfections! What a vista does it open to us into the vast plans and purposes of Jehovah!

In the fourth place, geology reveals to us a curious series of improvements in the condition of worlds, as they pa.s.s through successive changes.

If the earth began its existence in the state of vapor, we can hardly imagine it in that state capable of sustaining any organic natures, formed upon the general type of those now existing. Nor, when the vapor was condensed into a molten globe, could such natures inhabit it, till a crust had formed over its surface, and the heat had been so reduced as not to decompose animals and plants. Even then, the natures placed upon it must have been of a peculiar and low type of organization, capable of enduring the high temperature and catastrophes which would destroy those of more delicate and complicated organization. But gradually did the temperature diminish, while aqueous and atmospheric agencies were acc.u.mulating a deeper and a richer soil, so that the next change of inhabitants would allow natures of a higher organization and a denser population to occupy the surface. Their remains, buried in the earth, would increase the quant.i.ty of carbonate of lime in a form available for the use of animals and plants; that is, lime would gradually be eliminated, by plants and animals, from its more concealed combinations in the crystalline rocks, and be converted into carbonates, sulphates, and humates. A larger amount of organic matter would also be converted into humus. Now, limestone soils are of all others most favorable to vegetation, when there is a sufficient supply of organic matter. Hence every successive change becomes more and more adapted for animals and plants, because the lime and the organic matter in a state favorable for their support have been increasing; and the present state of the surface is more favorable than any conditions which have preceded it, and accordingly it is peopled with more perfect and more numerous organic natures. Can we doubt but that, if another change pa.s.ses over the earth, this same great principle of progressive improvement will be manifested in the renovated world? I am not prepared to maintain, however, that this future change will be, like the past ones, an improvement as to soil and climate; for the change, as Scripture teaches, will be accomplished by fire; and so different will be the state of existence in the new earth, wherein dwelleth righteousness, that we cannot say how far the present system of nature will be introduced. But that it will be an improved condition, we can hardly doubt, if we infer any thing from the splendid figures by which it is described in the Bible, and from the character of those who are to be its denizens.

Some of the facts of modern astronomy impress us with the idea that this principle of progress may extend to other worlds. Some of these are in a gaseous state, some condensed into fiery liquid globes, some covered with a crust of solidified volcanic matter, and some surrounded by a liquid, like water. Do not these facts justify the supposition, that the changes which our earth has undergone are merely a single example of a great principle in G.o.d's government of the natural world? If so, it presents the divine wisdom in an interesting aspect. We see the Deity employing the same matter for different purposes. Instead of creating it for one single economy of organic beings, he seems to have made it the theatre for the display of his benevolence through successive periods; but at the same time not losing sight of the highest use he intended to make of it, by the introduction of rational and immortal natures upon it. Human wisdom would have p.r.o.nounced this impossible; but divine wisdom, prompted by divine benevolence, could accomplish it.

Finally, geology discloses to us chemical change as a great animating, controlling, and conservative principle of the material universe.

When Newton brought to light the principle of gravitation, and showed how it controls and keeps in harmonious movement the heavenly bodies, he developed the great mechanical power by which the universe is governed.

And this power was supposed for a long time to be superior to all others.

But geology has brought out a second great controlling and conservative agency,--the chemical power,--"the second right hand of the Creator," as Dr. McCulloch expressively calls it. Suppose matter under the control of gravity, and let it be balanced by a centrifugal force. You have, indeed, harmonious motions among the celestial bodies, and, if no disturbing cause come in, you have endless motion. But until you introduce chemical agencies, every thing in the individual worlds would be compacted by gravity into one dead ma.s.s of matter, destined to no resurrection. But let chemical agencies leaven that ma.s.s, let affinity and cohesion commence their segregating processes, and constant motion and change would follow, with a thousand new and splendid forms. Especially when the Deity had infused the living principle into portions of that matter, and put chemistry, and her handmaid electricity, under the control of the vital power, would these worlds teem with animation, and countless exhibitions of beauty.

And in all known worlds, these chemical changes are at work unceasingly.

We know not whether those worlds are all inhabited, but we have evidence that all are undergoing the trans.m.u.tations of chemistry; not on their surface merely, but in their deep interior. The consequence is, universal change; change often upon a vast scale; change extending through thousands and millions of years, and through the entire ma.s.s of immense worlds. We have glanced, in these lectures, at the most important of those changes which this world has undergone, and we have seen it to be almost universal. We have found that the entire crust of the globe, many miles in thickness, and probably to its centre, has been dissolved by heat, and much of it also by water; that a large part of it, at least, has, by the same chemistry, been made to const.i.tute portions of the animal frame; that, even now, much of its interior is held in igneous solution, and that probably the time was when its entire ma.s.s was a molten, self-luminous world. Indeed, the conjecture is not without some foundation, which carries back this chemical action one step farther, and makes the world originally a diffused ma.s.s of nebula.

At this point of the argument, geology appeals to astronomy, to show how widely this principle of chemical change has operated, and still operates, in the universe. We look first at the nebul; for here we probably find matter in its most chaotic and attenuated form, const.i.tuting self-luminous, diffused ma.s.ses of vapor. In some of them, however, that matter has begun to condense, doubtless by the radiation of its heat. In the comets, we find probably similar matter, some of it still farther advanced in the process of condensation, so that perhaps a nearly solid nucleus may exist. In the sun and fixed stars, the condensation has gone on so far that cohesive attraction begins to operate, the latent heat of the vapor is extricated, and melted luminous worlds are the result. Around them, however, there probably still floats a wide atmosphere of the more elastic materials, which the heat dissipates, of which the zodiacal light, perhaps, furnishes us with an example. The nebulosity which surrounds the asteroids, Ceres, Pallas, Juno, Vesta, and Astrea, renders it probable that, though they have advanced so far in the process of refrigeration as to become opaque, they may still retain heat enough to dissipate much of their substance. Still farther advanced towards the condition of a habitable world is the moon; and yet volcanic desolation covers its surface. Not improbably Jupiter is nearly surrounded with a fluid like water, and Saturn by a fluid lighter than water--being still farther advanced towards the condition of the earth.

I acknowledge that these are but slight glimpses of the geology and chemistry of other worlds. And yet, taken in connection with the geological history of our own globe, do they not furnish us with some extremely probable examples of those changes to which our earth has been subject? They show us that worlds may exist in the form of vapor, and that some are actually at this time in the various conditions through which geology supposes this world to have pa.s.sed. Do we not, in these examples, gather strong intimations of a great law of chemical change in the universe? Gaseous matter, so far as we know, appears to have been the earliest state of the universe; and then, by the agency of heat, it pa.s.ses through the successive changes of liquid and solid, which have been described.

The chemical changes that take place on the earth, under our immediate cognizance, through the agency of water, usually proceed, under favorable circ.u.mstances, in a cycle; that is, the substance, after pa.s.sing through a series of changes, returns at length into the same condition from which it started. Thus aqueous vapor, by the loss of heat, is first converted into water, next into ice, and then, by the access of heat, into water again, and at last into vapor. The question naturally arises, whether those mutations, through which worlds are pa.s.sing, may not form a similar cycle.

We are able to trace them through several steps, from gaseous to liquid, and from the liquid to the solid; and we are a.s.sured, on the testimony of Scripture, that the next change of the earth will be from solid to liquid.

And in those stars which in past ages have suddenly broken forth with remarkable splendor, and then disappeared, may we not have examples of other worlds burnt up,--not annihilated,--but deluged by fire, and either dissipated or again cooled? What changes, if any, will succeed the final conflagration of the globe, neither science nor revelation informs us.

Yet, if the laws of nature respecting heat are not entirely altered, other changes must follow; and we have seen, in a former lecture, that those changes are perfectly consistent with our ideas of heaven, and that they may, in fact, enhance the happiness of heaven. They may go on forever; in which case, we can hardly doubt but they would form a cycle, though how wide the circuit we cannot conjecture; or they may, at least, reach an unchanging state. I confess, however, that the idea of perpetual change corresponds best with the a.n.a.logies of the existing universe; and in eternity, as well as in time, it may form an essential element of happiness.

In this world, too, this unceasing change, though it presents at first view a strong tendency to ruin, is, in fact, the grand conservative principle of material things. In a world of life and motion like ours, it is impossible that bodies, especially organic bodies, should not be sometimes subject to violent disarrangements and destruction from the mechanical agencies which exist; and were no chemical changes possible, ultimate and irremediable ruin must be the result. But the chemical powers, inherent in matter, soon bring forth new forms of beauty from the ruins; and, in fact, throughout all nature, the process of renovation usually counterbalances that of destruction; and thus far, indeed, the former has done more than this; for every time nature has changed her dress in past ages, she has put on more lovely robes, and a fresher countenance. Can we doubt that this same principle of change, operating, as it does, on a stupendous scale through the universe, is one of the great means of its preservation? It seems, indeed, paradoxical to say that instability is the basis of stability. But I see not why it is not literally true; and I can hardly doubt but this principle is superior to the laws of gravity--superior to every other law, in fact, for giving permanence and security to the universe.

It is true that, in the case of man, connected as diminution and decay are with the curse denounced on sin, they a.s.sume, in his view, a melancholy aspect; and the perishable nature of all created things has ever been viewed by the sentimentalist with sad emotions.

"What does not fade? The tower that long had stood The crush of thunder, and the warring winds, Shook by the slow but sure destroyer Time, Now hangs in doubtful ruins o'er its base; And flinty pyramids and walls of bra.s.s Descend; the Babylonian spires are sunk; Achaia, Rome, and Egypt moulder down.

Time shakes the stable tyranny of thrones; And tottering empires rush by their own weight.

This huge rotundity we tread grows old, And all those worlds that roll around the sun.

The sun himself shall die, and ancient night Again involve the desolate abyss."--_Akenside._

If we turn now our thoughts away from man's dissolution, and think how speedily chemical power will raise nature out of her grave, in renovated and increased beauty, this universal tendency to decay puts on the aspect of a glorious transformation. We connect the changes around us with those which have taken place in the great bodies of the universe; we see them all to be but parts of a far-reaching plan of the Deity, by which the stability of the world is maintained, and its progressive improvement secured. When we look forward, fancy kindles at the developments of divine power, wisdom, and benevolence which will in this manner be made in the round of eternal ages. We see that what our ignorance had mistaken for a defect in nature is, in fact, a great conservative principle of the universe, which Newton did not discover because geology had not yet unfolded her record.

Such are the developments of the divine character and plans unfolded to us by geology. Compare them now with the views which have hitherto prevailed. The common opinion has been, and still, indeed, is, that about six thousand years ago this earth, and, in fact, the whole material universe, were spoken into existence in a moment of time; and that, in a few thousand more, they will, by a similar fiat, be swept from existence, and be no more. On the other hand, geology places the time when the matter of the universe was created out of nothing at an epoch indefinitely but immensely remote. Since that epoch, this matter has pa.s.sed through a mult.i.tude of changes, and been the seat of numerous systems of organic life, unlike one another, yet all linked together into one great system by a most perfect unity; each minor system being most beautifully adapted to its place in the great chain, and yet each successive link becoming more and more perfect. Nor does geology admit that any evidence exists of the future annihilation of the material universe; but rather of other changes, by which new and brighter displays of divine wisdom and benevolence shall be brought out, it may be in endless succession. Geology is not, indeed, insensible to the displays of the divine character which are exhibited on the present theatre of the world. Indeed, she distinctly recognizes the act which is now pa.s.sing as the most perfect of all. Yet this scene of the great drama she regards as only one of the units of a similar series of changes that have gone by or will hereafter come; the chain stretching so far into the eternity that is past and the eternity that is to come, that the extremities are lost to mortal vision.

Do any shrink back from these immense conclusions, because they so much surpa.s.s the views they have been accustomed to entertain respecting the beginning and the end of the material universe? But why should they be unwilling to have geology liberalize their minds as much in respect to duration as astronomy has done in respect to s.p.a.ce? Perhaps it is a lingering fear that the geological views conflict with revelation. Such fears formerly kept back many from giving up their souls to the n.o.ble truths of astronomy. But they learnt, at length, that astronomy merely ill.u.s.trates, and does not oppose, revelation. It showed men how to understand certain pa.s.sages of sacred writ respecting the earth and heavenly bodies which they had before misinterpreted. Just so is it with geology. There is no collision between its statements and revelation. It only enables us more correctly to interpret some portions of the Bible; and then, when we have admitted the new interpretation, it brings a flood of light upon the plans and attributes of Jehovah. Geology, therefore, should be viewed, as it really is, the auxiliary both of natural and revealed religion. And when its religious relations are fully understood, theology, I doubt not, will be as anxious to cultivate its alliance as she has been fearful of it in days past.

"Shall it any longer be said," remarks Dr. Buckland, "that a science which unfolds such abundant evidence of the being and attributes of G.o.d, can reasonably be viewed in any other light than as the efficient auxiliary and handmaid of religion? Some few there still may be whom timidity, or prejudice, or want of opportunity, allow not to examine its evidence; who are alarmed by the novelty, or surprised by the magnitude and extent, of the views which geology forces on their attention; and who would rather have kept closed the volume of witness which has been sealed up for ages beneath the surface of the earth than to impose on the student in natural theology the duty of studying its contents--a duty in which, for lack of experience, they may antic.i.p.ate a hazardous or laborious task, but which, by those engaged in it, is found to be a rational, and righteous, and delightful exercise of the highest faculties in multiplying the evidence of the existence, and attributes, and providence of G.o.d. The alarm, however, which was excited by the novelty of its first discoveries, has well nigh pa.s.sed away; and those to whom it has been permitted to be the humble instruments of their promulgation, and who have steadily persevered, under the firm conviction that 'truth can never be opposed to truth,' and that the works of G.o.d, when rightly understood, and viewed in their true relations, and from a right position, would at length be found to be in perfect accordance with his word, are now receiving their high reward in finding difficulties vanish, objections gradually withdrawn, and in seeing the evidences of geology admitted into the list of witnesses to the truth of the great fundamental doctrines of theology."--_Bridgewater Treatise_, vol. i. p. 593.

Such, then, in conclusion of the subject, is the religion of geology. It has been described as a region divided between the barren mountains of scepticism and the putrid fens and quagmires of infidelity and atheism; producing only a gloomy and a poisonous vegetation; covered with fogs, and swept over by pestilential blasts. But this report was made by those who saw it at a distance. We have found it to be a land abounding in rich landscapes, warmed by a bright sun, blest with a balmy atmosphere, covered by n.o.ble forests and sweet flowers, with fruits savory and healthful. We have ascended its lofty mountains, and there have we been greeted with prospects of surpa.s.sing loveliness and overwhelming sublimity. In short, nowhere in the whole world of science do we find regions where more of the Deity is seen in his works. To him whose heart is warmed by true piety, and whose mind has broken the narrow sh.e.l.l of prejudice, and can grasp n.o.ble thoughts, these are delightful fields through which to wander. More and more they must become the favorite haunts of such hearts and such minds. For there do views open upon the soul, respecting the character and plans of the Deity, as large and refreshing as those which astronomy presents. Nay, in their practical bearing, these views are far more important. Mechanical philosophy introduces an unbending and unvarying law between the Creator and his works; but geology unveils his providential hand, cutting asunder that law at intervals, and planting the seeds of a new economy upon a renovated world. We thus seem to be brought into near communion with the infinite mind. We are prepared to listen to his voice when it speaks in revelation. We recognize his guiding and sustaining agency at every step of our pilgrimage. And we await in confident hope and joyful antic.i.p.ation those sublime manifestations of his character and plans, and those higher enjoyments which will greet the pure soul in the round of eternal ages.

LECTURE XIV.

SCIENTIFIC TRUTH, RIGHTLY UNDERSTOOD, IS RELIGIOUS TRUTH.

The connection between science and religion has ever been a subject of deep interest to enlightened and reflecting minds. Too often, however, up to the present time, has the theologian, on the one hand, looked with jealousy upon science, fearful that its influence was hurtful to the cause of true religion; while, on the other hand, the philosopher, in the pride of a sceptical spirit, has scorned an alliance between science and theology, and even fancied many a discrepancy. Both these opinions are erroneous; and disastrously have they operated, as well upon science as upon religion. The position which I take, and which I shall endeavor to maintain, is, that _scientific truth, rightly understood, is religious truth_.

The proposition may be misunderstood at its first announcement, but I hope, ere its examination be finished, to satisfy you that it is true; and if so, that it ought to reconcile religion to science, and science to religion.

In arriving at correct conclusions concerning this statement, much will depend on the meaning which we attach to the phrase _religious truth_.

Religion is properly defined to be piety towards G.o.d. This piety implies two things: first, a correct knowledge of G.o.d; and secondly, the exercise of proper affections in view of that knowledge. The former const.i.tutes the theoretic part of religion, and is investigated solely by the understanding. The latter const.i.tutes the practical part of religion, and depends much upon the will, the heart, or the moral powers of man. All truth, therefore, which ill.u.s.trates the divine character or government, or which tends to produce right affections towards G.o.d, is properly denominated religious truth. If, then, I can show that all scientific truth, rightly understood, has one or both of these effects, it will follow that it is strictly religious truth.

Scientific truth is but another name for the laws of nature. And a law of nature is merely the uniform mode in which the Deity operates in the created universe. It follows, then, that science is only a history of the divine operations in matter and mind.

In order to avoid mistake, we must make a distinction between the principles of science, and the application of those principles to the useful arts of life. The principles themselves are an ill.u.s.tration of the divine wisdom and benevolence, but their application to the arts ill.u.s.trates the ingenuity and wisdom of man. At the most, therefore, the latter only indirectly and remotely exhibits the character of the Deity, while the former directly shows forth his perfections.

I now proceed to establish my general proposition, by showing, in the first place, that _all scientific truth is adapted to prove the existence or to ill.u.s.trate the perfections of the Deity_.

After all that has been written on the subject of natural theology, by such men as Newintyt, Ray, Derham, Wollaston, Clarke, Butler, Tucker, Paley, Chalmers, Crombie, Brown, Brougham, Harris, M'Cosh, and the authors of the Bridgewater Treatises, I need not surely go into details to prove that science in general is a great storehouse of facts to ill.u.s.trate the divine perfections and government. It is, indeed, a vast repository, from which materials have been drawn on which to build the argument for the divine existence and character. Efforts have been made, it is true, in modern times, to show that the whole argument from design is inconclusive.

It is said, that though the operations of nature seem to show design and contrivance, they need no higher powers than those that exist in nature itself. They do not prove the existence of an independent personal agent, separate from the material world. Animals, and even plants, possess an inherent power of adapting themselves to circ.u.mstances; and may not a higher exercise of this same power explain all the operations of nature without any other Deity?

This argument appears to me to be utterly set aside by the following considerations: In the first place, there is no power inherent in vegetable or animal natures which can properly be called the power of contrivance and design, except so far as it exists in their minds. All other examples show merely the operation of impulse, or instinct, and will not at all explain that wide-reaching contrivance and design which cause all the operations of nature to conspire to certain great results, and to const.i.tute one, and only one, great system. In the second place, the operations of intellect furnish us with the only examples in nature of that kind of contrivance and design which must have arranged and adapted the parts of the universe. But in the third place, no intellect, within our knowledge, is capacious enough to have contrived and arranged the universe. Indeed, to the capacity of that mind which could have done this we can a.s.sign no limits, and, therefore, infer it to be infinite. In other words, we infer the existence of the Deity. In the fourth place, the whole force of this argument rests upon the supposed uniformity of nature. For no one imagines that there exists at present, in nature, any power of contrivance and design sufficient to work a miracle; in other words, to introduce new races of animals and plants. "Could this uniformity once be broken up," says an ingenious expositor of this atheistic argument, "could this rigid order be once infringed for a good and manifest reason, it would change the whole face of the argument. Could we see the sun stand still in heaven, that the wicked might be overthrown, then should we be a.s.sured of a personal power with a distinct will, whose agents and ministers these laws were. Such an event would be a miracle. But if such events have happened, they are not a part of nature; it is not nature that tells us of them, and it is only with her that we are at present concerned."--_President Hopkins, Quarterly Observer_, Oct. 1833, p. 309.

Geology, however, does reveal to us miracles of stupendous, import, miracles of creation, which infinite power and wisdom alone could have produced. Hence, if the testimony of that science be admitted, this reasoning can no longer stand the test of examination, and it must be acknowledged that the argument for G.o.d's existence from design, which has ever been so satisfactory to every mind not clouded by metaphysics, is left standing on an immovable foundation.