Samuel Butler (1835-1902), The Way of All Flesh
, chapter XIX:
Being in this world is it not our most obvious business to make the most of it—to observe what things do bona fide tend to long life and comfort, and to act accordingly? All animals, except man, know that the principal business of life is to enjoy it—and they do enjoy it as much as man and other circumstances will allow. He has spent his life best who has enjoyed it most; God will take care that we do not enjoy it any more than is good for us.