A man who waits to believe in action before acting is anything you like, but he's not a man of action. It is as if a tennis player before returning a ball stopped to think about his views of the physical and mental advantages of tennis. You must act as you breathe.
Conversation with Jean Martet (18 December 1927), Ch. 11, p. 167. - Clemenceau, The Events of His Life (1930)