All is a miracle. The stupendous order of nature, the revolution of a hundred millions of worlds around a million of stars, the activity of light, the life of all animals, all are grand and perpetual miracles.

The perfect is the enemy of the good.

God has punished the knave, and the devil has drowned the rest.

Only your friends steal your books.

Our labour preserves us from three great evils -- weariness, vice, and want.

Wherever my travels may lead, paradise is where I am.

When we cannot use the compass of mathematics or the torch of experience...it is certain we cannot take a single step forward.