"The most powerful stories are those that speak to the soul."

It is because nations tend to stupidity and baseness that democracy is possible.

唯一存在的限制是你心中的限制。

Theorems are eternal; their proofs are ephemeral.

The only way to do great work is to love what you do.

Financial crises are not acts of God. They are caused by human actions and can be prevented by human actions.

拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到对称性和拓扑的保护，使它们对某些类型的无序免疫。