I'm not afraid to take risks, because I know that's where growth happens.

I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.

There is nothing which I dread so much as a division of the republic into two great parties, each arranged under its leader, and concerting measures in opposition to each other.

哲学的真正意义在于它能够唤醒我们内心的质疑精神。