“There's no chance of their having a conscious glimpse of the truth as long as they refuse to disturb the things they take for granted and remain incapable of explaining them. For if your starting-point is unknown, and your end-point and intermediate stages are woven together out of unknown material, there may be coherence, but knowledge is completely out of the question.”

“True opinions are a fine thing and do all sorts of good so long as they stay in their place; but they will not stay long. They run away from a man's mind, so they are not worth much until you tether them by working out the reason. Once they are tied down, they become knowledge, and are stable.”

“One of the penalties of refusing to participate in politics is that you end up being governed by your inferiors.”

“All the same, we ought to point out that if the kinds of poetry and representation which are designed merely to give pleasure can come up with a rational argument for their inclusion in a well-governed community, we'd be delighted -- short of compromising the truth as we see it, which wouldn't be right -- to bring them back from exile: after all, we know from our own experience all about their spell. I mean haven't you ever fallen under the spell of poetry, Glaucon, especially when the spectacle is provided by Homer?”

“The rhetorician need not know the truth about things; he has only to discover some way of persuading the ignorant that he has more knowledge than those who know.”

“A library of wisdom, is more precious than all wealth, and all things that are desirable cannot be compared to it. Whoever therefore claims to be zealous of truth, of happiness, of wisdom or knowledge, must become a lover of books.”

“O dear Pan and all the other gods of this place, grant that I may be beautiful inside. Let all my external possessions be in friendly harmony with what is within. May I consider the wise man rich. As for gold, let me have as much as a moderate man could bear and carry with him.”