孔子说：“理想无法实现了，我准备乘筏漂到海上。会跟我走的，只有子路吧？”

I think it's very important to have a feedback loop， where you're constantly thinking about what you've done and how you could be doing it better.I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.

If you want to understand a system, try changing it.

"We are all in the gutter, but some of us are looking at the stars."