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.
什么是言论自由？没有冒犯的自由，言论自由就不复存在。
The last of human freedoms is the ability to choose one's attitude in any given set of circumstances.
——1998年6月25日，在旧金山举行的Window》s 98操作系统发布会上发言