解释：影子的弯曲与正直是随身体而变化的，根源不在影子自身；自己的屈曲与伸直是随外物而变化的，而不在于个人的主观意志。这就是保持谦退才能使自己处世为先的道理。

Leadership means making tough decisions today that will blossom into opportunities tomorrow.

To try to write love is to confront the muck of language: that region of hysteria where language is both too much and too little, excessive and impoverished.

学习数学的唯一方法就是做数学。

自己不愿干的，不要强加给别人。

你的大脑是你最重要的资产，照顾好它。