Simplicity is not the absence of complexity, but the resolution of it.

【讲解】：有了过错而不改正，这才真叫过错呢。

最难的事情是变得简单。

The study of topological phases of matter is a testament to the power of theoretical physics to predict and explain new states of matter.

幸福来自内心，而不是物质的东西。