There are no forbidden questions in science, no matters too... - Carl Sagan

"I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves."

"La prueba de ausencia no es prueba de ausencia"

"We are all star stuff."

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

"Who is more humble? The scientist who looks at the universe with an open mind and accepts whatever the universe has to teach us, or somebody who says everything in this book must be considered the literal truth and never mind the fallibility of all the human beings involved?"