The essence of mathematics is not just in solving problems but in asking the right questions.
數(shù)學的本質不僅在于解決問題，還在于提出正確的問題。
科學的樂趣在于旅程，而不僅僅是終點。
The best fertilizer is the farmer's shadow—nothing replaces presence and attention in the fields.
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.