Theorems are eternal; their proofs are ephemeral.
把你的心挂在袖子上不是一个好计划；你应该把它放在里面，那里它运作得最好。
I dream that my son will grow up to be a good person, a free person. I dream that someday you will return to revisit the land of our childhood. I dream that flowers will bloom in the streets again...and kites will fly in the skies!
音乐是灵魂的语言，它能以言语无法企及的方式触动人心。
The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given nature, but result from the social process which creates man.
The secret of a happy old age is to have a good memory and a bad one.