Date: w. 350 B.C.

"It follows that the soul is analogous to the hand; for as the hand is a tool of tools, so the mind is the form of forms and sense the form of sensible things."

— Aristotle (384-322 B.C.)

Date: w. 350 B.C.

"The process [of thinking] is like that in which the air modifies the pupil in this or that way and the pupil transmits the modification to some third thing (and similarly in hearing), while the ultimate point of arrival is one, a single mean, with different manners of being."

— Aristotle (384-322 B.C.)

Date: 350 B.C.

"Suppose that the eye were an animal--sight would have been its soul, for sight is the substance or essence of the eye which corresponds to the formula, the eye being merely the matter of seeing; when seeing is removed the eye is no longer an eye, except in name"

— Aristotle (384-322 B.C.)