"If you feel like you're losing everything, remember that trees lose their leaves every year and they still stand tall and wait for better days."

在桂林学界迎会的演说，1922年1月22日

我们所知的物理定律可能只是更大定律集合中的一小部分。

Every challenge in the energy sector is an opportunity to do better.

The freedom then of man, and liberty of acting according to his own will, is grounded on his having reason, which is able to instruct him in that law he is to govern himself by, and make him know how far he is left to the freedom of his own will.

归根结底，哲学是理论领域的阶级斗争。