"Books are the plane, and the train, and the road. They are the destination, and the journey. They are home."

Success is not about how much money you make, it’s about the difference you make in people’s lives.

The art of teaching is the art of assisting discovery.

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

一个人胜券在握时，总是应该公平行事。