You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.
我在历史中学到的唯一东西就是:大众从未从历史中汲取教训。(11月17日名言)
The essence of mathematics lies in its freedom.
Don't be pushed by your problems. Be led by your dreams.