Every person you meet knows an amazing lot about something you know virtually nothing about. Your job is to discover what it is, and it won’t be obvious.
刀展示了锋利,而试刀砍头的人将遭到不祥。 
活着是世界上最罕见的事情。大多数人只是存在,仅此而已。
The best performance improvement is the transition from the nonworking state to the working state.