证明的严谨性将数学与所有其他科学区分开来。
The human being is a most curious creature. He thinks he has a soul, but he is a soul; he has a body.
时间可以吞噬一切,但它丝毫不能减少的是你伟大的思想,你的幽默,你的善良,还有你的勇气。
I think it's important to take risks and not be afraid of failure.