I don't think you should ever settle in life, ever.

Great leaders don't create followers; they create more leaders.

A mathematician's work is never done; there are always more problems to solve.

青春不是年华，而是心境；青春不是桃面、丹唇、柔膝，而是深沉的意志，恢宏的想象，炙热的恋情；青春是生命的深泉在涌流。