Unfaithfulness ought to extinguish love, and we should not be jealous when there is reason to be. Only those who give no grounds for jealousy are worthy of it.

We sometimes differ more widely from ourselves than we do from others.

Hatred is stronger than friendship.

It is oftener by the estimation of our own feelings that we exaggerate the good qualities of others than by their merit, and when we praise them we wish to attract their praise.

Nothing is so contagious as example; and we never do any great good or evil which does not produce its like.

If we did not flatter ourselves, the flattery of others could never harm us.

Gratitude is like the good faith of traders: it maintains commerce, and we often pay, not because it is just to discharge our debts, but that we may more readily find people to trust us.