“The credit belongs to the man who is actually in the arena; whose face is marred by sweat and blood; who strives valiantly; who errs and comes short again and again because there is no effort without error and shortcoming; who knows the great enthusiasms, the great devotion, spends himself in a worthy cause; who at best knows in the end the triumph of high achievement; and 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 have never tasted victory or defeat.”