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.

I don’t compete with nobody but myself. My biggest competition is me.

没有小故事，只有讲得不好的故事。

The robustness of topological states against local perturbations is a testament to the power of topology in protecting quantum information.