人们改变了,却忘了告诉对方。
我们能体验到的最美丽的东西是神秘的。它是所有真正艺术和科学的源泉。
The challenge is to make the invisible visible.
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.