我表演不是为了逃避现实；我表演是为了理解它。
I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.
The truth is rarely pure and never simple.