The worst thing about slavery is that the slaves eventually get to like it.

The things best to know are first principles and causes, but these things are perhaps the most difficult for men to grasp, for they are farthest removed from the senses.

We have no evidence as yet about mind or the power to think; it seems to be a widely different kind of soul, differing as what is eternal from what is perishable; it alone is capable of existence in isolation from all other psychic powers.

Even if we could suppose the citizen body to be virtuous, without each of them being so, yet the latter would be better, for in the virtue of each the virtue of all is involved.

... the science we are after is not about mathematicals either none of them, you see, is separable.

A true friend is one soul in two bodies.

A man is the origin of his action.