Human time does not turn in a circle; it runs ahead in a straight line. That is why man cannot be happy: happiness is the longing for repetition. 人类之时间不是循环转动的,而是直线前进。这就是为什么人类不可能幸福的缘故,因为幸福是对重复的渴望。

——米兰・昆德拉不能承受的生命之轻