What ever you do, do it well. Do it so well that when people see you do it they will want to come back and see you do it again and they will want to bring others and show them how well you do what you do.

生活的目的不是快乐。它是有用的，是光荣的，是富有同情心的，是让你活得有意义，活得好。

When you get an invitation to do something in the future， ask yourself: would you accept this if it was scheduled for tomorrow？ Not too many promises will pass that immediacy filter.

The key to success is to focus on goals, not obstacles.

发明的艺术在于找出已知现象的原因。