分散投资是金融界唯一的免费午餐。

I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.

Leaders must be willing to take risks if they want to create meaningful change.

我们不是从祖先那里继承了土地，而是从子孙那里借来的。