我不是悲观主义者。我是一个经历了很多的乐观主义者。
I’m not a pessimist. I’m an optimist who’s been through a lot.
The speed of change is such that we have to run faster just to stay in the same place.
The most durable thing in writing is style, and style is the most valuable investment a writer can make with his time.
寻找万物理论是现代物理学中最令人兴奋和最具挑战性的追求之一。
民主城邦的基础是自由权。