In the world of physics, we often find that the simplest questions are the hardest to answer.
在物理学的世界里，我们经常发现最简单的问题最难回答。
To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact.
To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.
The study of economic history is not just about the past; it’s about understanding the roots of present inequalities.
