Jealousy is the greatest of all evils, and the one that arouses the least pity in the person who causes it.

We are deceived if we think that mind and judgment are two different matters: judgment is but the extent of the light of the mind. This light penetrates to the bottom of matters; it remarks all that can be remarked, and perceives what appears imperceptible. Therefore we must agree that it is the extent of the light in the mind that produces all the effects which we attribute to judgment.

A man is perhaps ungrateful, but often less chargeable with ingratitude than his benefactor is.

If one judges love by the majority of its effects, it is more like hatred than like friendship.

The most sure method of subjecting yourself to be deceived is to consider yourself more cunning than others.

We are always bored by the very people by whom it is vital not to be bored.

The soul's maladies have their relapses like the body's. What we take for a cure is often just a momentary rally or a new form of the disease.