书是一面镜子：如果一只猿猴往里看，不太可能有一位使徒往外看。

Art should be something that liberates the soul, provokes the imagination and encourages people to go further.

Quantum cryptography doesn't rely on the difficulty of mathematical problems, but on the fundamental laws of physics.

The forest doesn't need us; we need the forest.

一切迄今为止社会的历史都是阶级斗争的历史。