Date: w. 350 B.C.

"The process of movement stamps in, as it were, a sort of impression of the percept, just as persons do who make an impression with a seal."

— Aristotle (384-322 B.C.)

Date: w. 350 B.C.

"This explains why, in those who are strongly moved owing to passion, or time of life, no memory is formed; just as no impression would be formed if the movement of the seal were to impinge on running water; while there are others in whom, owing to the receiving surface being frayed, as happens t...

— Aristotle (384-322 B.C.)

Date: w. 350 B.C.

"The former are too moist, the latter too hard, so that in the case of the former the image does not remain in the soul, while on the latter it is not imprinted at all."

— Aristotle (384-322 B.C.)