“A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.” -Louis Nizer, lawyer (1902-1994).

用手工作是个劳工，用手和大脑工作是个工匠，用手、大脑和心去工作，才是艺术家。所以，做学问也一样，不仅用手用脑，还需要专心投入。古今中外都一样啊。

想想教科书里那些美妙的定律、公式，无不是艺术品。读读那些经典论文，都可以看出作者们的心思巧妙、用心良苦。