I'm interested in the way we see things, which is always changing.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

共享电子对构成了化学键。

The same principles which at first view lead to skepticism， pursued to a certain point， bring men back to common sense.

在桂林学界迎会的演说，1922年1月22日

我不害怕表明立场。每个人都来握住我的手。我们将一起走过这条路，穿越风暴。无论天气如何，寒冷或温暖。只是想让你知道，你并不孤单。如果你觉得你也走过同样的路，就大声喊出来。

当年的年轻人已变成了花下之尘。