Once is happenstance. Twice is coincidence. Three times is enemy action. (Auric Goldfinger, in Goldfinger by Ian L. Fleming)

The artist is nothing without the gift, but the gift is nothing without work. (Emile Zola)

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

Black holes are where God divided by zero. (Steven Wright)