I think that the most important thing in life is to be happy and to make other people happy.

Speak confidently as if you are right， but listen carefully as if you are wrong.

译文：假如让青春年华虚度，到年老时只能悔恨不已。赏析：人生短暂，年华易逝，我们要珍惜每天的日子，不要蹉跎岁月。