I don’t regret the things I’ve done, I regret the things I didn’t do when I had the chance.

The challenge is to design spaces that serve people without dominating them.

Mathematics is not just a human invention; it has a deep reality that exists independently of us.

It's not about how hard you hit. It's about how hard you can get hit and keep moving forward.

即使处于巅峰，我也一直在寻找进步的方法。

Teaching is the most glorious profession under the sun.