The growth and shape of a human skeleton are determined, not solely by inheritance and nutrition, but partly also by what its possessor does with his bones. They become compressed here, enlarged there, in response to tugging muscles or sagging burdens.

So with medical ethics. The codes and standards of the physician depend in part on the peculiar strains and stresses, the special irritations and inspirations of his professional work. He may turn away from them all, unbranded and undeveloped by his lot. If so, he remains the exceptional man to whom the conclusions of this essay have no application.