Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.

I always tell my kids if you lay down, people will step over you. But if you keep scrambling, if you keep going, someone will always, always help you.

The only fence against the world is a thorough knowledge of it.

The only limit to our realization of tomorrow will be our doubts of today.

Good deeds do not cancel out bad, nor do bad deeds erase good.

世界是一个迷宫，我们都在试图找到出路。

I'm not going to be someone I'm not.