Happiness, says an old lesson, lies rather in achievement than in possession or satiation. The healthy man asks not so much for happiness as for an opportunity to exercise his capacities; and if he must pay the penalty of pain for this freedom and this power he makes the forfeit cheerfully; it is not too great a price. We need resistance to raise us, as it raises the airplane or the bird; we need obstacles against which to sharpen our strength and stimulate our growth. Life without tragedy would be unworthy of a man.
