As Nietzsche said, " one must never have spared oneself, harshness must be among one's habits if one is to be happy and cheerful among nothing but hard truths."

正如尼采所说，“一个人必须永远不放过自己，如果一个人想要在严酷的事实中感到快乐和愉快，他必须习惯严厉对待自己。”