善意并不是自己内心发出的，不能保留；行为自身不能够理解和辨别的，不能去做。

用秤称一称，才能知道轻重；用尺量一量，才能知道长短。

The key is to set realistic customer expectations, and then not to just meet them, but to exceed them — preferably in unexpected and helpful ways.

I was looking for the key for years, but the door was always open.

英雄和恶棍之间的界限常常因视角而模糊。