Somewhere, something incredible is waiting to be known.

Anything you don't understand, Mr. Rankin, you attribute to God. God for you is where you sweep away all the mysteries of the world, all the challenges to our intelligence. You simply turn your mind off and say God did it.

Absence of evidence is not evidence of absence.

Every one of us is precious in the cosmic perspective. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.

All civilizations become either spacefaring or extinct.

If you wish to make an apple pie from scratch, you must first invent the universe.

We are star stuff which has taken its destiny into its own hands.