Everyone confesses in the abstract that exertion which brings out all the powers of body and mind is the best thing for us all; but practically most people do all they can to get rid of it, and as a general rule nobody does much more than circumstances drive them to do.
Bio: Peter A. Franken was an American physicist who contributed to the field of nonlinear optics. He was president of the Optical Society of America in 1977.
