The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
The greatest legacy we can leave is a healthier planet for future generations.
The function of thought is to guide action.
受过教育的心灵的标志是能够思考一种思想而不必接受它。
It’s not about money.It’s about the people you have, how you’re led, and how much you get it.