The world is full of stories, but the stories are all one.
The best way of learning about anything is by doing.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
It does not matter how slowly you go as long as you do not stop.
形式系统的发展彻底改变了我们对数学的理解。
The beauty of mathematics lies in its ability to simplify the complex.