A friend to all is a friend to none.

Man is the metre of all things, the hand is the instrument of instruments, and the mind is the form of forms.

Now it is evident that the form of government is best in which every man, whoever he is, can act best and live happily.

Again, the male is by nature superior, and the female inferior; and the one rules, and the other is ruled; this principle, of necessity, extends to all mankind.

Since we think we understand when we know the explanation, and there are four types of explanation (one, what it is to be a thing; one, that if certain things hold it is necessary that this does; another, what initiated the change; and fourth, the aim), all these are proved through the middle term.

The worst form of inequality is to try to make unequal things equal.

A friend is a second self, so that our consciousness of a friend's existence...makes us more fully conscious of our own existence.