在探索理解量子引力的过程中，我们就像在广阔海洋岸边玩耍的孩子，偶尔发现一块光滑的鹅卵石或一个漂亮的贝壳，而真理的浩瀚海洋仍未被我们发现。
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.
Productivity metrics that ignore environmental impact are accounting tricks, not real progress.
每种心理状态都有其存在的目的；要理解它，我们必须询问它在更广泛的行为系统中发挥什么功能。
The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
It is vain to talk of the interest of the community， without understanding what is the interest of the individual.
The past is a mirror in which we see ourselves reflected.