[91] I use the term "image" in the sense of optics, not of psychology.

[92] That something of the cognitive, something of the sign or term function, enters in as a catalyzer, so to speak, in even the most aesthetic experiences, seems to be altogether probable, but that question it is not necessary to raise here.

[93] The superst.i.tion that whatever influences the action of a conscious being must be an unconscious sensation or perception, if it is not a conscious one, should be summarily dismissed. We are active beings from the start and are naturally, wholly apart from consciousness, engaged in redirecting our action in response to changes in our surroundings. _Alternative_ possibilities, and hence an indeterminate situation, change direct response into a response mediated by a perception as a sign of possibilities, that is, a physiological stimulus into a perceived quality: a sensory datum.

[94] Compare Woodbridge, _Journal of Philosophy and Psychology_, X, 5.

[95] See Russell, _Scientific Method in Philosophy_, p. 53.

[96] _Ibid._, p. 101.

[97] See the essay on _The Existence of the World as a Logical Problem_.