Man by Nature desires to know.

Every great genius has an admixture of madness.

He who has never learned to obey cannot be a good commander.

... the science we are after is not about mathematicals either none of them, you see, is separable.

The soul is the cause or source of the living body. The terms cause and source have many senses. But the soul is the cause of its body alike in all three senses which we explicitly recognize. It is (a) the source or origin of movement, it is (b) the end, it is (c) the essence of the whole living body.

A city is composed of different kinds of men; similar people cannot bring a city into existence.

Perfect friendship is the friendship of men who are good, and alike in excellence; for these wish well alike to each other qua good, and they are good in themselves.