Ten long trips around the sun since I last saw that smile, but only joy and thankfulness that on a tiny world in the vastness, for a couple of moments in the immensity of time, we were one.

The Universe revealed by science is one of far more awesome grandeur than any religion has ever posited.

I don't have any faith, but I have a lot of hope, and I have a lot of dreams of what we could do with our intelligence if we had the will and the leadership and the understanding of how we could take all of our intelligence and our resources and create a world for our kids that is hopeful.

And what greater might do we possess as human beings than our capacity to question and to learn?

No single step in the persuit of enlightenment should ever be considered sacred; only the search was.

The greatest thing that science teaches you is the law of unintended consequences.

Carl took on the military-industrial complex. He campaigned around the world for an end to the production of weapons of mass destruction. To him it was a perversion of science.