如果我不进入地狱拯救众生，还有谁会去？

The motor of our ingenuity is the question ‘Does it have to be like this?’, from which arise political reforms, scientific developments, improved relationships, better books.

数学之美不仅在于它描述世界的能力，还在于它揭示支配世界的隐藏结构的力量。

量子力学的教训是，我们必须修正我们对现实的经典观念。