Man is a biped without feathers.

Every serious man in dealing with really serious subjects carefully avoids writing. ... There does not exist, nor will there ever exist, any writing of mine dealing with this subject.

But tell me, this physician of whom you were just speaking, is he a moneymaker, an earner of fees, or a healer of the sick?

The flute is not an instrument that has a good moral effect - it is too exciting.

May not the wolf, as the proverb says, claim a hearing?

One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors.

The natural function of the wing is to soar upwards and carry that which is heavy up to the place where dwells the race of gods. More than any other thing that pertains to the body it partakes of the nature of the divine.