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.

[M]ere knowledge of the truth will not give you the art of persuasion.

They (the poets) are to us in a manner the fathers and authors of the wisdom.

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.

Health is a consumation of a love affair of all the organs of the body.

The soul should concentrate itself by itself.

Mathematics is the language in which the gods talk to people.