追求数学真理是一项既个人又普遍的努力。
The doorway to happiness opens from the inside.
有两样东西不一定要有意义，一个是音乐，另一个是笑。
世界是一种我们已忘记如何言说的语言。
译文：大树根深不怕疾风的摇动，树木笔直不担心影子歪斜。赏析：做人光明磊落，胸襟宽广，就不怕背后有人说三道四，评长论短。
The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life.