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

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

C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do, it blows away your whole leg. (Bjarne Stroustrup)