From what has been said we can clearly understand the nature of Love and Hate. Love is nothing else but pleasure accompanied by the idea of an external cause: Hate is nothing else but pain accompanied by the idea of an external cause. We further see, that he who loves necessarily endeavors to have, and to keep present to him, the object of his love; while he who hates endeavors to remove and destroy the object of his hatred.

I have resolved to demonstrate by a certain and undoubted course of argument, or to deduce from the very condition of human nature, not what is new and unheard of, but only such things as agree best with practice.

Desire nothing for yourself, which you do not desire for others.

The multitude always strains after rarities and exceptions, and thinks little of the gifts of nature; so that, when prophecy is talked of, ordinary knowledge is not supposed to be included. Nevertheless it has as much right as any other to be called Divine.

Everything in nature is a cause from which there flows some effect.

The proper study of a wise man is not how to die but how to live.

Love is nothing but joy accompanied with the idea of an eternal cause.