The quality of life is determined by its activities.

And yet the true creator is necessity, which is the mother of invention.

In general, what is written must be easy to read and easy to speak; which is the same.

Bring your desires down to your present means. Increase them only when your increased means permit.

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

The aim of education is to make the pupil like and dislike what he ought....The little human animal will not at first have the right responses. It must be trained to feel pleasure, liking, disgust, and hatred at those things which really are pleasant, likable, disgusting, and hateful.

A friend is a second self.