"The only thing to do with good advice is to pass it on. It is never of any use to oneself."
自守形式的研究不仅是一个技术课题，也是一个哲学课题。
永远不要停止学习；当你认为自己无所不知的那天，就是你开始落后的那天。
外交需要持久的耐心和坚定的决心，以推动复杂问题的解决。
The only real mistake is the one from which we learn nothing.
The aim of proof is to understand, not just to verify.