Life has no meaning a priori. It is up to you to give it a meaning.

成功不仅仅是赚钱，而是要有所作为。

I think that in mathematics, and maybe in life, you have to be willing to be a little bit lost.

"The truth is, we don't know what we want until we see it."

引力比其他力弱得多这一事实可能是物理学中最深刻的谜团。