真相很少是纯粹的，也从来不是简单的。

一个好的数学家总是准备好进行概括。

"The best performance improvement is the transition from the nonworking state to the working state."

He who can, does. He who cannot, teaches.

伟大并非在于力量的强大，而是你如何使用你的力量。

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.