Music directly imitates the passions or states of the soul...when one listens to music that imitates a certain passion, he becomes imbued withthe same passion; and if over a long time he habitually listens to music that rouses ignoble passions, his whole character will be shaped to an ignoble form.

To say of what is that it is not, or of what is not that it is, is false, while to say of what is that it is, and of what is not that it is not, is true.

One may go wrong in many different ways, but right only in one, which is why it is easy to fail and difficult to succeed.

Also, that which is desirable in itself is more desirable than what is desirable per accidens.

Between friends there is no need of justice.

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

Have a definite, clear, practical ideal - a goal, an objective.