The only way to learn mathematics is to do mathematics.
人生是美好的。
The mind is nature's answer to the challenges of existence.
释义：当与敌人作战时，如果敌方的将领愚钝，不懂得随机应变，就可以用利益来诱使他们做出错误的决定，从而达到战胜敌人的目的。
挑战是伪装的机会；它们推动我们创新和改进。
The most sustainable leather comes from the most respected animals.
The harder you work for something, the greater you’ll feel when you achieve it.
Every aspect of learning or any other feature of intelligence can in principle be so precisely described that a machine can be made to simulate it.