While you invent, don't select. While you sketch, don't inspect. While you write the first draft, don't reflect.
当我走出囚室、迈过通往自由的监狱大门时,我已经清楚,自己若不能把悲痛与怨恨留在身后,那么我其实仍在狱中。
The beauty of mathematics lies not only in its ability to describe the world but also in its power to reveal the hidden structures that govern it.