If a man had begun to hate an object of his love, so that love is thoroughly destroyed, he will, causes being equal, regard it with more hatred than if he had never loved it, and his hatred will be in proportion to the strength of his former love.

If anyone conceives, that an object of his love joins itself to another with closer bonds of friendship than he himself has attained to, he will be affected with hatred towards the loved object and with envy towards his rival.

The mind can only imagine anything, or remember what is past, while the body endures.

The human mind cannot be absolutely destroyed along with the body, but something of it remains, which is eternal.

Men will find that they can ... avoid far more easily the perils which beset them on all sides by united action.

. . . to know the order of nature, and regard the universe as orderly is the highest function of the mind.

The order and connection of ideas is the same as the order and connection of things.