A state is an association of similar persons whose aim is the best life possible. What is best is happiness, and to be happy is an active exercise of virtue and a complete employment of it.

...for all men do their acts with a view to achieving something which is, in their view, a good.

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

For through wondering human beings now and in the beginning have been led to philosophizing.

Tyrants preserve themselves by sowing fear and mistrust among the citizens by means of spies, by distracting them with foreign wars, by eliminating men of spirit who might lead a revolution, by humbling the people, and making them incapable of decisive action.

The worst thing about slavery is that the slaves eventually get to like it.

Now, the causes being four, it is the business of the student of nature to know about them all, and if he refers his problems back to all of them, he will assign the "why" in the way proper to his science-the matter, the form, the mover, that for the sake of which.