"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?"
"Extraordinary claims require extraordinary evidence."
"There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths."
"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."
"I don't want to believe. I want to know."
"If it can be destroyed by the truth, it deserves to be destroyed by the truth."