当我们为后代考虑而采石时，石头就变成了桥梁，而不仅仅是资源。
When we quarry with future generations in mind, stone becomes a bridge, not just a resource.
"Books are the keys to unlocking our potential for change."
传记是我们最接近时间旅行的方式。
I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.
I'm only rich because I know when I'm wrong... I basically have survived by recognizing my mistakes.