Truth is not found in the light, but in the shadows where we dare not look.

最好的书是改变你思维方式的书。

我们在Facebook上试图做的事情，就是帮助人们更有效地连接和沟通。

Leadership in times of change requires both vision and the courage to make difficult decisions.

历史不是过去。它是我们进化出来的组织我们对过去的无知的方法。

Innovation in mining technology isn't about replacing people, but about empowering them to do their jobs better and safer.

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