没有公义，勇气是虚弱的。
没有自由就没有创造，没有创造就没有真正的生活。
There was another life that I might have had, but I am having this one.
数学是一项协作的努力。没有人可以单独完成。
The total amount of suffering per year in the natural world is beyond all decent contemplation. During the minute that it takes me to compose this sentence, thousands of animals are being eaten alive, many others are running for their lives, whimpering with fear, others are slowly being devoured from within by rasping parasites, thousands of all kinds are dying of starvation, thirst, and disease.
未来建立在合作而非竞争之上。