It's amazing how difficult it is for a man to understand something if he’s paid a small fortune not to understand it.
令人惊讶的是，如果一个人花了一小笔钱不理解它，那么他理解它是多么困难。
The interplay between topology and symmetry in materials can lead to unexpected and exciting physical phenomena.
The past is never dead. It's not even past.
The greatest happiness is to know the source of unhappiness.
我不是政治家，我只是一个关心的公民。
"La libertad no es un regalo, es una conquista diaria."