最好的数学不仅严谨，而且优雅。
The best mathematics is not just rigorous; it is also elegant.
The truth is a weapon, and like any weapon, it can be used for good or ill.
A building must be true to itself.
Never stop learning. The minute you think you know it all is the minute you stop growing.
在科学中最令人兴奋的短语，预示着新发现的，不是“我发现了！”，而是“这有点奇怪……”
