You cannot go into the same water twice.

When a person supposes that he knows, and does not know; this appears to be the great source of all the errors of the intellect.

The State which we have founded must possess the four cardinal virtues of wisdom, courage, discipline and justice ... Justice is the principle which has in fact been followed throughout, the principle of one man one job, of minding one s own business , in the sense of doing the job for which one is naturally fitted and not interfering with other people.

One cannot make a slave of a free person, for a free person is free even in a prison.

All knowledge is but remembrance.

Man is the plumeless genus of bipeds, birds are the plumed.

All well bred men should have mastered the art of singing and dancing.