The entire ocean is affected by a single pebble.

The truth about nature we discover with our brains. The truth about religion we discover with our hearts.

The two principles of truth, reason and senses, are not only both not genuine, but are engaged in mutual deception. The senses deceive reason through false appearances, and the senses are disturbed by passions, which produce false impressions.

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. . . .

There is nothing so insupportable to man as to be in entire repose, without passion, occupation, amusement, or application. Then it is that he feels his own nothingness, isolation, insignificance, dependent nature, powerless, emptiness. Immediately there issue from his soul ennui, sadness, chagrin, vexation, despair.

The Christian's God does not merely consist of a God who is the Author of mathematical truths and the order of the elements. The God of Abraham, the God of Isaac, the God of Jacob, the God of the Christians, is a God of love and consolation.

Not to be mad is another form of madness