The result of the mathematician's creative work is demonstrative reasoning, a proof; but the proof is discovered by plausible reasoning, by guessing.

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.

In this digital age with its speed of change, any brand that refuses to ‎innovate will die

Wisdom clears the mind of delusions thus making it more focused to achieve excellence.

Beware what you consume, lest you appetite grow by what it feeds on.

If I take death into my life, acknowledge it, and face it squarely, I will free myself from the anxiety of death and the pettiness of life - and only then will I be free to become myself.

If the people of America do not rise up, take ownership of our country, we're going to lose it forever.

It's the old shell game.

In some ways, I'm relieved that I didn't have a son.

Revolution is like the daughters of Pelias: it cuts humanity to pieces in order to rejuvenate it.

I am a child of the 21st century.

Look like the innocent flower, But be the serpent under it.