Every mathematical problem is a window into a deeper understanding of the world.

"The past is the past, but the future is a blank canvas."

书是对抗遗忘的武器。

Music has the power to bring people together from all walks of life.

生下来就知道的人是上等，经过学习才知道的人是次一等，遇到困惑才学习的人是又次一等，有了困惑而不学习的，这是最下等的人。