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

The fundamental cause of trouble in the world is that the stupid are cocksure while the intelligent are full of doubt. (Bertrand Russell)

Only two things are infinite, the universe and human stupidity, and I’m not sure about the former. (Albert Einstein)

His ignorance is encyclopedic (Abba Eban)

An inconvenience is only an adventure wrongly considered; an adventure is an inconvenience rightly considered. (Gilbert Keith Chesterton)

God is a comedian playing to an audience too afraid to laugh. (Voltaire)