如果你不疯狂,你就不是真正的天才。
The circumstances of the world are continually changing, and the opinions of man change also; and as government is for the living, and not for the dead, it is the living only that has any right in it.
The best way to be happy is to be grateful.
科学发现的真正本质不在于它提供的答案,而在于它提出的新问题。