All soul is immortal. For that which is always in movement is immortal; that which moves something else, and is moved by something else, in ceasing from movement ceases from living. So only that which moves itself, because it does not abandon itself, never stops moving. But it is also source and first principle of movement for the other things which move.

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.

If you ask: What is the good of education? The answer is easy: Education makes good men and good men act nobly.

All knowledge is but remembrance.

There should exist among the citizens neither extreme poverty nor again excessive wealth, for both are productive of great evil.

I do not think it is permitted that a better man be harmed by a worse.

I really do not know, Socrates, how to express what I mean. For somehow or other our arguments, on whatever ground we rest them, seem to turn round and walk away from us.