思考是最艰难的工作，这可能是为什么如此少的人从事它。
Thinking is the hardest work there is, which is probably the reason why so few engage in it.
The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.
我不知道我想要什么。我反复无常、不坚定、被动；我喜欢不确定、无边界；我喜欢持续的不确定性。
Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.