"You can't do anything about the length of your life, but you can do something about its width and depth."

I'm not trying to be perfect, I'm trying to be honest.

In the quest to understand quantum gravity, we are like children playing on the shore of a vast ocean, occasionally finding a smooth pebble or a pretty shell, while the great ocean of truth lies undiscovered before us.

I'm not interested in the rules of perspective. I'm interested in the way we actually see.

让人们保持被动和顺从的聪明方法是严格限制可接受意见的范围，但在该范围内允许非常活跃的辩论。

当我们的知识之圆扩大之时，我们所面临的未知的圆周也一样。