成功的真正标准是你帮助他人取得成功的程度。

"The world is full of stories, but the best ones are the ones we live."

史记

"A book is a mirror: if a fool looks in, no sage can look out."

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

I don’t think about age. If you keep working hard, you can keep going.