For the rhapsode ought to interpret the mind of the poet to his hearers, but how can he interpret him well unless he knows what he means?

God is not the author of all things, but of good only.

That man is wisest who, like Socrates, realizes that his wisdom is worthless

The rulers of the state are the only persons who ought to have the privilege of lying, either at home or abroad; they may be allowed to lie for the good of the state.

So the nature required to make a really noble Guardian of our commonwealth will be swift and strong, spirited, and philosophic.

One trait in the philosopher's character we can assume is his love of the knowledge that reveals eternal reality, the realm unaffected by change and decay. He is in love with the whole of that reality, and will not willingly be deprived even of the most insignificant fragment of it - just like the lovers and men of ambition we described earlier on.

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.