Economics is ultimately about improving human welfare.

算法研究不仅在于解决问题，还在于理解计算可能性的极限。

I cannot fix on the hour, or the spot, or the look, or the words, which laid the foundation. It is too long ago. I was in the middle before I knew that I had begun.

The act of reading is an act of empathy, a way of stepping into someone else's shoes.

The more you learn, the more you realize how little you know.

Every soul needs rest and relaxation.