Mathematics is not a spectator sport.

写作是一种乐观的行为。如果你觉得它不重要，你就不会费心去做。

I’m not afraid to be vulnerable. It’s part of being human.

身份高贵的人，不应该欺凌地位卑贱的人；腰缠万贯的人，不应该对穷人傲慢无礼。否则的话，他的荣华富贵就很难持久了。

The present state of the system of nature is evidently a resultant of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.