The most hateful thing for a man is to have knowledge of everything but power over nothing.

It is the duty of the human understanding to understand that there are things which it cannot understand.

读书人应当以天下大事为自己的责任，不能仅仅做一个只会钻研书本的学者。

始终保持你的刀锋利，你的智慧更锋利，你的精神最锋利。