Natural wealth is limited and easily obtained; the wealth defined by vain fancies is always beyond reach.

Vain is the word of a philosopher which does not heal any suffering of man. For just as there is no profit in medicine if it does not expel the diseases of the body, so there is no profit in philosophy either, if it does not expel the suffering of the mind.

Only the just man enjoys peace of mind.

We must, therefore, pursue the things that make for happiness, seeing that when happiness is present, we have everything; but when it is absent, we do everything to possess it.

Do not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for.

There is no such thing as justice or injustice among those beasts that cannot make agreements not to injure or be injured. This is also true of those tribes that are unable or unwilling to make agreements not to injure or be injured.

Injustice is not evil in itself, but only in the fear and apprehension that one will not escape those who have been set up to punish the offense.