The Quantum Universe has a quotation from me in every chapter - but it's a damn good book anyway.

Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there.

There is enough energy in a single cubic meter of space to boil all the oceans in the world.

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."

To not know math is a severe limitation to understanding the world.

I, a universe of atoms, an atom in the universe.

If you're doing an experiment, you should report everything that you think might make it invalid - not only what you think is right about it; other causes that could possibly explain your results; and things you thought of that you've eliminated by some other experiment, and how they worked -to make sure the other fellow can tell they have been eliminated.