We are not afraid to take risks, but we do so intelligently.
饥饿的时候就不惜妄取以保存性命,吃得很饱的时候又用虚伪的行为来粉饰自己。 
The best way to understand something is to try to change it.
我认为数学之所以有价值,是因为它具有这种令人难以置信的结构,你可以探索和发现。