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。
Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.
You can't change what you are, only what you do.
一个奇怪的事实是，关于地球史前条件得出了完全相反的结论，这反映了我们目前知识的不完整状态。
If you want to be successful, you have to be willing to make sacrifices.
I'm not a rapper, I'm an icon.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.