对付不自由世界的唯一方法就是变得绝对自由，以至于你的存在本身就是一种反抗。
"The only way to do great work is to love what you do."
出门时笑一笑，不要心怀悲哀，广阔的胸怀处处都能敞开。
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. You can turn over a new leaf every hour if you choose.
引用沈祖芸
The most exciting moments in mathematics are when you realize that two seemingly unrelated areas are deeply connected.