Science is a way of thinking much more than it is a body of... - Carl Sagan

"In that case, on behalf of Earthlife, I urge that, with full knowledge of our limitations, we vastly increase our knowledge of the Solar System and then begin to settle other worlds."

"Somewhere, something incredible is waiting to be known."

"La prueba de ausencia no es prueba de ausencia"

"I don't want to believe. I want to know."

"You can get into a habit of thought in which you enjoy making fun of all those other people who don't see things as clearly as you do. We have to guard carefully against it."