Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.

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.

真正的领导力意味着出于正确的原因做出艰难的决定。

学习数学的唯一方法就是做数学。

没有死亡，女儿。人们只有在被遗忘时才会真正死去。

自然是最伟大的智者。