Opportunity is missed by most people because it is dressed in overalls and looks like work.

Vision without execution is delusion.

The money one gets for selling one's soul is always spent in deadening one's conscience, so the net gain at the end of a lifetime is no greater than if the diabolic bargain had not been struck.

Not only will atomic power be released, but someday we will harness the rise and fall of the tides and imprison the rays of the sun.

I consider Paine our greatest political thinker. As we have not advanced, and perhaps never shall advance, beyond the Declaration and Constitution, so Paine has had no successors who extended his principles.

We haven't failed. We now know a thousand things that won't work, so we are much closer to finding what will.

I believe in the existence of a Supreme Intelligence pervading the Universe.