"The best way to learn mathematics is to do mathematics."

【译文】三个人在一起走路，其中一定有可以作为我老师的人。选择他的优点向他学习，对于他的缺点，就反省自己加以改正。

真相很少是纯粹的，也从来不是简单的。

Everyone, when they are young, knows what their Personal Legend is. At that point in their lives, everything is clear and everything is possible. They are not afraid to dream, and to yearn for everything they would like to see happen to them in their lives.