Men believe themselves to be free, simply because they are conscious of their actions, and unconscious of the causes whereby those actions are determined.

He alone is free who lives with free consent under the entire guidance of reason.

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.

Measure, time and number are nothing but modes of thought or rather of imagination.

He who wishes to revenge injuries by reciprocal hatred will live in misery. But he who endeavors to drive away hatred by means of love, fights with pleasure and confidence; he resists equally one or many men, and scarcely needs at all the help of fortune. Those whom he conquers yield joyfully

The more we understand individual things, the more we understand God.

I shall consider human actions and desires in exactly the same manner, as though I were concerned with lines, planes and solids.