The structure of the international system forces states to behave in certain ways, regardless of their internal characteristics.

We must balance short-term gains with long-term vision.

The study of L-functions is a journey into the hidden symmetries of the number field.

Stay true to yourself, yet always be open to learn.

True progress is measured not just in yields, but in the positive impact we create.

"To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness."

幸福不是没有问题，而是有能力处理问题

What I remember above all about Harvard was being in the midst of so much energy and intelligence. It could be exhilarating, intimidating, sometimes even discouraging, but always challenging. It was an amazing privilege…and though I left early, I was transformed by my years at Harvard, the friendships I made, and the ideas I worked on.