The essence of mathematics lies in its freedom.
Curiosity is what drives science forward, but wisdom must guide its application.
译文：世间总有得不到的东西，也总有办不到的事。
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
处理一个不自由的世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。