The principle is so perfectly general that no particular application of it is possible.

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.

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

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.

Your life should reflect your heart.

Politics makes estranged bedfellows.

I love you more than I could ever promise because you take me the way I am.

I'm a great believer in stunt doubles. They do an amazing job.

I'm funny how, I mean funny like I'm a clown?

If you are not moving forward, the world is passing you by.

I will never again attempt to tell any young person what to do - the really gifted don't need advice and the others can't take it.

Nobody wants to feel they're not a rebel.

Be like children , Not childish BUT childlike.

One aspect of neighbourly love is that we must not merely will our neighbours good, but actually work to bring it about.