Beauty in mathematics is seeing the truth without effort.

Mathematics is not a spectator sport!

Mathematics is being lazy. Mathematics is letting the principles do the work for you so that you do not have to do the work for yourself

What is the difference between method and device? A method is a device which you use twice.

The first rule of discovery is to have brains and good luck. The second rule of discovery is to sit tight and wait till you get a bright idea.

John von Neumann was the only student I was ever afraid of.

Geometry is the science of correct reasoning on incorrect figures.