Sometimes it happens that a man's circle of horizon becomes smaller and smaller, and as the radius approaches zero it concentrates on one point. And then that becomes his point of view.

I didn't work especially hard at mathematics at school, because I knew that's what I'd be doing later.

Geometry is the most complete science.

The infinite! No other question has ever moved so profoundly the spirit of man.

For us there is no ignorabimus, and in my opinion none whatever in natural science. In opposition to the foolish ignorabimus our slogan shall be: "We must know - we will know!"

One must be able to say at all times--instead of points, straight lines, and planes--tables, chairs, and beer mugs

One hears a lot of talk about the hostility between scientists and engineers. I don't believe in any such thing. In fact I am quite certain it is untrue... There cannot possibly be anything in it because neither side has anything to do with the other.