But at my back I always hear Time’s winged chariot hurrying near. (Andrew Marvell)

Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)

All are lunatics, but he who can analyze his delusion is called a philosopher. (Ambrose Bierce)

The only difference between me and a madman is that I’m not mad. (Salvador Dali)

The power of accurate observation is frequently called cynicism by those who don’t have it. (George Bernard Shaw)