A mathematician's intuition is as important as rigorous proof.
数学家的直觉和严谨的证明同样重要。
No matter what happens in life, be good to people. Being good to people is a wonderful legacy to leave behind.
每本书都是作者首先要独自经历的旅程。
每一个词都是通向理解的一步。
"In the middle of difficulty lies opportunity."