The marvelous richness of human experience would lose something of rewarding joy if there were no limitations to overcome. The hilltop hour would not be half so wonderful if there were no dark valleys to traverse.
如果没有需要克服的限制，人类经验的惊人丰富性将失去一些有益的快乐。如果没有黑暗的山谷可供穿越，山顶的时间也不会如此美妙。