If you wish to learn swimming you have to go into the water and if you wish to become a problem solver you have to solve problems.

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.

You want some sweet and lovely things, Tessa, but be careful. Other people can't always give you what you want.

Culture is the intersection of people and life itself. It's how we deal with life, love, death, birth, disappointment... all of that is expressed in culture.

This actual world of what is knowable, in which we are and which is in us, remains both the material and the limit of our consideration.

Pressure is what you feel when you don't know what's going on.

It is not much good thinking of a thing unless you think it out.

Mirrors should reflect a little before throwing back images.

God exposes your sin...And you see yourself as small as you are in the presence of a holy God.

The saved are singled out not by their own merits, but by the grace of the Mediator.

Money has power. And so withholding money has power too, especially when a bunch of people do it together.

Don't be a writer. Writing is an escape from something. You be a scientist.