Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

The best way to learn mathematics is to do mathematics.

If we want clean air and water, we must start by protecting our forests.

成功是从一个失败跌到另一个失败，但热情不减。

God's great power is in the gentle breeze,not in the storm.

利润不是企业的正当目的。企业的正当目的是提供人们需要的产品或服务，并且做得足够好从而获得利润。

出自汉·桓宽《盐铁论·相刺》。释义：碎玉满箱，算不得拥有财宝；读了几箱子的书，也不等于就掌握了其中的道理。