数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
A novel should be both a mirror and a window.
He who can, does. He who cannot, teaches.
The ultimate search engine would understand everything in the world. It would understand exactly what you meant, and it would give you back exactly what you wanted.
No one had ever had such a friend, so affectionate,so loyal and so skillful.