实现明天理想的唯一限制是我们今天的疑虑。
The only limit to our realization of tomorrow is our doubts of today.
I think that the most important thing is to be grateful for what you have.
2004年9月13日，81岁的杨振宁在清华大学开始为本科生讲授普通物理。他说
The most important thing in a story is not what happens, but why it happens.
Quality means doing it right when no one is looking.