Jealousy is bred in doubts. When those doubts change into certainties, then the passion either ceases or turns absolute madness.

The person giving the advice returns the confidence placed in him with a disinterested eagerness... and he is usually guided only by his own interest or reputation.

The first lover is kept a long while, when no offer is made of a second.

Few things are impossible in themselves: application to make them succeed fails us more often than the means.

We should not judge a man's merits by his great qualities, but by the use he makes of them.

When our hatred is violent, it sinks us even beneath those we hate.

Were we perfectly acquainted with the object, we should never passionately desire it.