Nature makes nothing incomplete, and nothing in vain.

We have no evidence as yet about mind or the power to think; it seems to be a widely different kind of soul, differing as what is eternal from what is perishable; it alone is capable of existence in isolation from all other psychic powers.

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

Evils draw men together.

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.

So we must lay it down that the association which is a state exists not for the purpose of living together but for the sake of noble actions.

Governments which have a regard to the common interest are constituted in accordance with strict principles of justice, and are therefore true forms; but those which regard only the interest of the rulers are all defective and perverted forms, for they are despotic, whereas a state is a community of freemen.