你唯一应该努力超越的人就是昨天的自己。

"Every saint has a past, and every sinner has a future."

Symmetry is a complexity-reducing concept (co-routines include subroutines); seek it everywhere.

The central task of education is to implant a will and facility for learning; it should produce not learned but learning people. The truly human society is a learning society, where grandparents, parents, and children are students together.

成功不是终点，失败也非致命，继续前进的勇气才是关键。