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。

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

In the quest for understanding, failure is not the opposite of success; it is a stepping stone to it.

The most dangerous phrase in business is "We've always done it this way."

You have to believe in yourself when no one else does—that's what makes you a winner.