Life is what happens when you’re busy making other plans.

To do mathematics is to engage in an act of creation and discovery simultaneously.

Patriotism is a pernicious, psychopathic form of idiocy.

We must balance the need for affordable energy today with the imperative of building a sustainable energy future.

A covenant not to defend myself from force， by force， is always void.

拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到保护，不受无序和缺陷的影响。