有时最深刻的数学来自于玩弄简单的想法，直到它们展现出隐藏的复杂性。
Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.
死者一直在倾听。死者一直在注视。
让它落下来吧，即使箭头会刺进我的心里。
We don't stop playing because we grow old; we grow old because we stop playing.
要信守承诺。