If there is a problem you can't solve, then there is an easier problem you can't solve: find it.

In order to solve this differential equation you look at it until a solution occurs to you.

It is better to solve one problem five different ways, than to solve five problems one way.

Beauty in mathematics is seeing the truth without effort.

Solving problems is a practical art, like swimming, or skiing, or playing the piano: you can learn it only by imitation and practice.

It may be more important in the mathematics class how you teach than what you teach.

An idea which can be used only once is a trick. If one can use it more than once it becomes a method.

Geometry is the science of correct reasoning on incorrect figures.

Mathematics is not a spectator sport!

Look around when you have got your first mushroom or made your first discovery: they grow in clusters.

Mathematics consists in proving the most obvious thing in the least obvious way.

We met each other when we were young, before we knew enough about disappointment, and once we did we found we reminded each other of it.

The best vaccine against anger is to watch others in its throes.

A head can be beaten small enough until it fits the hat.

Make it so good and so clear that it doesn't need any further explanation.

Come ye saints look here and wonder See the place where Jesus lay He has borne our sins away Joyful tiding Yes the Lord has risen today.

We all name ourselves. We call ourselves artists. Nobody asks us. Nobody says you are or you aren't.

I have four children and I have seven grandkids.

Our galaxy is 10 billion years old. The Earth is only 4.5 billion years old. We are a firefly flicker in the great astrobiology of the galaxy.

Endless money forms the sinews of war. [Lat., Nervi belli pecunia infinita.]

There can be no excess to love, none to knowledge, none to beauty.