Concupiscence and force are the source of all our actions; concupiscence causes voluntary actions, force involuntary ones.

All man's troubles come from not knowing how to sit still in one room.

No one is offended at not seeing everything; but one does not like to be mistaken, and that perhaps arises from the fact that man naturally cannot see everything, and that naturally he cannot err in the side he looks at, since the perceptions of our senses are always true.

All our dignity lies in our thoughts.

It is certain that those who have the living faith in their hearts see at once that all existence is none other than the work of the God whom they adore. But for those in whom this light is extinguished, [if we were to show them our proofs of the existence of God] nothing is more calculated to arouse their contempt. . . .

Man is so made that by continually telling him he is a fool he believes it, and by continually telling it to himself he makes himself believe it. For man holds an inward talk with himself, which it pays him to regulate.

Lust is the source of all our actions, and humanity.