Of course we must keep young; but it is useless to keep young if we do not also grow up, and never stop growing up. To keep young, surely, is just to keep supple and keen; and to grow up is not at all a mere sinking into stiffness and into disillusion, but a rising into ever finer skill in all the actions of the game of living. There is something else, too, which is a part of growing up—to see that life is really, after all, a game; a terribly serious game, no doubt, but none the less a game. When we play a game, as it should be played, we strain every muscle to win; but all the while we care less for winning than for the game. And we play the better for it.