We seldom find people ungrateful so long as it is thought we can serve them.

Friendship is only a reciprocal conciliation of interests, and an exchange of good offices; it is a species of commerce out of which self-love always expects to gain something.

When the soul is ruffled by the remains of one passion, it is more disposed to entertain a new one than when it is entirely curedand at rest from all.

There are some people who would never have fallen in love if they had not heard there was such a thing.

To be a great man it is necessary to turn to account all opportunities.

In love we often doubt what we most believe.

Friendship is a traffic wherein self-love always proposes to be the gainer.