Self-sufficiency is both a good and an absolute good.

The complete man must work, study and wrestle.

Since the branch of philosophy on which we are at present engaged differs from the others in not being a subject of merely intellectual interest — I mean we are not concerned to know what goodness essentially is, but how we are to become good men, for this alone gives the study its practical value — we must apply our minds to the solution of the problems of conduct.

It may be argued that peoples for whom philosophers legislate are always prosperous.

It will contribute towards one's object, who wishes to acquire a facility in the gaining of knowledge, to doubt judiciously.

Music has a power of forming the character, and should therefore be introduced into the education of the young.

While most of those who hold that the whole heaven is finite say that the earth lies at the center, the philosophers of Italy, the so-called Pythagoreans, assert the contrary. They say that in the middle there is fire, and that the earth is one of the stars, and by its circular motion round the center produces night and day.