Aristotle

Wit is well-bred insolence.

A friend is a second self.

It is not always the same thing to be a good man and a good citizen.

There is no great genius without some touch of madness.

The aim of the wise is not to secure pleasure, but to avoid pain.

Whosoever is delighted in solitude is either a wild beast or a god.

Some animals are cunning and evil-disposed, as the fox; others, as the dog, are fierce, friendly, and fawning. Some are gentle and easily tamed, as the elephant; some are susceptible of shame, and watchful, as the goose. Some are jealous and fond of ornament, as the peacock.

A flatterer is a friend who is your inferior, or pretends to be so.

All human actions have one or more of these seven causes: chance, nature, compulsion, habit, reason, passion, and desire.

All virtue is summed up in dealing justly.

Humor is the only test of gravity, and gravity of humor; for a subject which will not bear raillery is suspicious, and a jest which will not bear serious examination is false wit.

In all things of nature there is something of the marvelous.

It is in justice that the ordering of society is centered.

It is the mark of an educated mind to be able to entertain a thought without accepting it.

Law is mind without reason.

Man is by nature a political animal.

Man perfected by society is the best of all animals; he is the most terrible of all when he lives without law, and without justice.

Misfortune shows those who are not really friends.

The moral virtues, then, are produced in us neither by nature nor against nature. Nature, indeed, prepares in us the ground for their reception, but their complete formation is the product of habit.

The only stable state is the one in which all men are equal before the law.