定理是数学的永久文献。

真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。

如果你不喜欢我，那是你的问题。

The past is never dead. It's not even past.

——在日本与宫崎寅藏谈论其革命宗旨与方法，1897年

A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.

【释义】评定有大功劳的人，不应计较他的小过错；推举有大善行的人，不应挑剔他的小毛病。