It is not the critic who counts, not the man who points out how the strong man stumbled, where the doer of the deeds could have done better. The credit belongs to the man who is actually in the arena whose face is marred by dust and sweat, who errs and comes short again and again, who at worst if he fails at least fails while daring greatly so that his place shall never be with those cold and timid souls who know neither victory nor defeat.
(Theodore Roosevelt, speech given in Paris at the Sorbonne in 1910)