The only limit to our realization of tomorrow is our doubts of today.

The world is full of stories, but the stories are all one.

All the great things are simple， and many can be expressed in a single word： freedom， justice， honor， duty， mercy， hope.

科学最重要的一点是，它是一种防止你对自己撒谎的方式。

When people talk, listen completely. Most people never listen.

地球上唯一伟大的是人，人身上唯一伟大的是心灵。