“The only good is knowledge and the only evil is ignorance.”

“There is only one good, knowledge, and one evil, ignorance.”

“For the fear of death is indeed the pretense of wisdom, and not real wisdom, being a pretense of knowing the unknown; and no one know whether death, which men in their fear apprehend to be the greatest evil, may not be the greatest good. Is not this ignorance of a disgraceful sort, the ignorance which is the conceit that a man knows that he does not know? And in this respect only I believe myself to differ from men in general, and may perhaps claim to be wiser than they are: that whereas I know but little of the world below, I do not suppose that I know...”

“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.”

“Be of good cheer about death, and know this of a truth, that no evil can happen to a good man, either in life or after death.”

“Would that the majority could inflict the greatest evils, for they would then be capable of the greatest good, and that would be fine, but now they cannot do either. They cannot make a man either wise or foolish, but they inflict things haphazardly.”

“I only know that I know nothing”