Happiness and unhappiness depend upon the opinion we have of things.

"We are bulletproof, but love is not."

The spread of liberal democracy and the integration of the world economy are the two main forces driving the world towards the end of history.

I have always lived in my imagination; reality bores me.

"The boundary between the quantum and classical worlds is not as clear as we once thought."

生活是世界上最罕见的事，大多数人只是存在而已。