Date: w. 350 B.C.

"Voice is a kind of sound characteristic of what has soul in it; nothing that is without soul utters voice, it being only by a metaphor that we speak of the voice of a flute or the lyre or generally of what (being without soul) possesses the power of producing a succession of notes which differ i...

— Aristotle (384-322 B.C.)

Date: w. 350 B.C.

"The doctrine of the Pythagoreans seems to rest upon the same ideas; some of them declared the motes in air, others what moved them, to be soul."

— Aristotle (384-322 B.C.)

Date: w. 350 B.C.

"Generally, about all perception, we can say that a sense is what has the power of receiving into itself the sensible forms of things without the matter, in the way in which a piece of wax takes on the impress of a signet-ring without the iron or gold; what produces the impression is a signet of ...

— 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.)

Date: w. 55-135

"Lay down for yourself, at the outset, a certain stamp and type of character for yourself, which you are to maintain whether you are by yourself or are meeting people"

— Epictetus (c. 55-c.135)

Date: 58

"Even the all-embracing universe and God who is its guide extends himself forth into outward things, and yet altogether returns from all sides back to himself. Let our mind do the same thing: when, following its bodily senses it has by means of them sent itself forth into the things of the outwar...

— Seneca, Lucius Annaeus (c. 4 B.C. - A.D. 65)

Date: w. c. 63 A.D.

"Moreover, we ought not to allow our desires to wander far afield, but we must make them confine themselves to our immediate neighbourhood, since they will not endure to be altogether locked up."

— Seneca, Lucius Annaeus (c. 4 B.C. - A.D. 65)

Date: 167

"[T]hou canst at a moment's notice retire into thyself"

— Marcus Aurelius (121-180)

Date: 397-401

"I have spilled and scattered ... my thoughts, the innermost bowels of my soul, are torn apart with the crowding tumults of variety."

— St. Augustine (354-430)