Happiness is beneficial for the body, but it is grief that develops the powers of the mind.

The purpose of architecture is to move us.

The road to success is always under construction.

The night is a great teacher, but few are willing to learn.

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

我已经失去我的生命中不死的一部分，留下来的也就跟畜生没有分别了。

用户需求是产品开发的出发点，也是落脚点。