Most people affirm pleasure to be the good, but the finer sort of wits say it is knowledge.
The right question is usually more important than the right answer.
Arithmetic is a kind of knowledge in which the best natures should be trained, and which must not be given up.
Is it not also true that no physician, in so far as he is a physician, considers or enjoins what is for the physician's interest, but that all seek the good of their patients? For we have agreed that a physician strictly so called, is a ruler of bodies, and not a maker of money, have we not?
Life should be lived as play.
The race of the guardians must be kept pure.