“It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred bu dust and sweat and blood; who strives valiantly who errs, who comes short again and again. . . who at the best knows in the end the triumph of achievement, and who at the worst, if he fails, at least fails while daring greatly.”