“Be true to thine own self”

“Such as thy words are such will thine affections be esteemed and such as thine affections will be thy deeds and such as thy deeds will be thy life ...”

“The only true wisdom is in knowing you know nothing.”

“True knowledge exists in knowing that you know nothing.”

“Is there not one true coin for which all things ought to exchange?- and that is wisdom; and only in exchange for this, and in company with this, is anything truly bought or sold, whether courage, temperance or justice. And is not all true virtue the companion of wisdom, no matter what fears or pleasures or other similar goods or evils may or may not attend her? But the virtue which is made up of these goods, when they are severed from wisdom and exchanged with one another, is a shadow of virtue only, nor is there any freedom or health or truth in her; but in the true exchange there is a purging away of all these things, and temperance, and justice, and courage, and wisdom herself, are a purgation of them.”

“True wisdom comes to each of us when we realize how little we understand about life, ourselves, and the world around us.”

“A system of morality which is based on relative emotional values is a mere illusion, a thoroughly vulgar conception which has nothing sound in it and nothing true.”