Theorems are the milestones of mathematics.
幸福的幸里面是一个“幸”,不是一个“辛”。  或者理解成,Y=Why=为什么,I=我。幸福里面没有为什么,只有我。 
I'm not a history, I'm a mystery.
Journalism can never be silent: that is its greatest virtue and its greatest fault.
Try never to be the smartest person in the room. And if you are, I suggest you invite smarter people... or find a different room.