“Life is good for only two things, discovering mathematics and teaching mathematics.” — Siméon-Denis Poisson (1781-1840)

Learn principles. Facts will then fall into their relations and connections.

TAKE short views. If you shoot at a near mark, even if your hand shakes you will hit it. If you shoot at a distant mark, and your hand vibrates slightly, you will miss it.

All see; few observe, fewer still compare.

People who live on the surface live long. People who live in the depths live much. -- G Watts