The more you know, the more you realize you don't know.
"The truth is rarely pure and never simple."
The rocks may be hard, but our resolve must be harder.
在量子力学中，观察者不是客观的，而是系统的一部分。
In mathematics, you don't understand things. You just get used to them.
I think the most important thing in life is self-confidence.
70岁，我才刚刚开始。等着瞧吧。