用户需求是商业的起点，也是终点。

In the first place God made idiots. This was for practice. Then He made School Boards.

We change our behavior when the pain of staying the same becomes greater than the pain of changing. Consequences give us the pain that motivates us to change.

生活很艰难，亲爱的，但你也很坚强。

没有天赋的艺术家什么都不是，但没有工作的天赋也什么都不是。