法律体系的存在是一个事实问题，而不是道德问题。

The ability to edit genes is a profound responsibility—one we must approach with humility.

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

I want to liberate America from fear. I want people to be afraid of the things that are really scary, like war and famine, not their neighbor because he has a different religion.

最大的弱点就是过分害怕显得软弱。