调夷之仇国以攻夷，师夷之长技以制夷。
调动洋人的敌对国家来攻打洋人，学习洋人先进的技术来制服洋人。
Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.
"Memory is fragile and the space of a single life is brief, passing so quickly that we never get a chance to see the relationship between events."
Love is or it ain't. Thin love ain't love at all.
The world is not run by those who are right. It is run by those who can convince others they are right.
"Mathematics is not a spectator sport."