We went to the Moon as technicians; we returned as humanitarians.

On the return trip home, gazing through 240,000 miles of space toward the stars and the planet from which I had come, I suddenly experienced the universe as intelligent, loving, harmonious.

When I went to the moon I was a pragmatic test pilot. But when I saw the planet Earth floating in the vastness of space the presence of divinity became almost palpable and I knew that life in the universe was not just an accident.

Another way to think of this is there are now 6.8 billion people on this planet, and half of them weren't even born when we went to the moon, and so they don't have the perspective.

Entanglement can best be understood as this: When subatomic matter is in a process together, subsequently the subatomic particles go apart from each other and go across the universe. When they do this, they will remain entangled. That means if you do something to one, the other one responds immediately, instantaneously.

To kill a citizen of our own country is evil, but to kill a citizen of another country is 'good.'

I think it laughable, frankly, that the physics community comes up with a theory for everything. There isn't one theory for everything. There is not one explanation. We may eventually have several theories that can tie things together nicely but there is not a single theory of everything.