“All our lives long, every day and every hour, we are engaged in the process of accommodating our changed and unchanged selves to changed and unchanged surroundings: living, in fact, is nothing else than this process of accommodation; when we fail in it a little, we are stupid, when flagrantly we are mad, when we give up the attempt altogether we die, when we suspend it temporarily we sleep. In quiet eventless lives the changes internal and external are so small that there is little or no strain in the process of fusion and accommodation; in other lives there is great strain, but there is also great fusing and accommodating power; in others great strain with little accommodating power. A life will be successful or not according as the power of accommodation is equal to or unequal to the strain of fusing and adjusting internal and external changes.”