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

Some cause happiness wherever they go; others, whenever they go. (Oscar Wilde)

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

Not everything that can be counted counts, and not everything that counts can be counted. (Albert Einstein)