Date: c. 501 B.C.

"For souls it is death to become water, and for water death to become earth. Water comes into existence out of earth, and soul out of water."

— Heraklitus (fl. 504-1 BCE)

Date: c. 501 B.C.

"A man, when he gets drunk, is led by a beardless lad, tripping, knowing not where he steps, having his soul moist."

— Heraklitus (fl. 504-1 BCE)

Date: c. 458 BC

"But even as trouble, bringing memory of pain, drips over the mind in sleep, so wisdom comes to men, whether they want it or not."

— Aeschylus (c. 525/524 BC-c. 456/455)

Date: c. 387 B.C.

"And by the sieve, my informant told me, he means the soul, and the soul of the foolish he compared to a sieve, because it is perforated through lack of belief and forgetfulness is unable to hold anything."

— Plato (427 BC - 347 BC)

Date: c. 370-365 B.C.

"And when this feeling continues and he is nearer to him and embraces him, in gymnastic exercises and at other times of meeting, then the fountain of that stream, which Zeus when he was in love with Ganymede named Desire, overflows upon the lover, and some enters into his soul, and some when he i...

— Plato (427 BC - 347 BC)

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.)