In a March 1996 profile by Jim Dawson in the Minneapolis Star-Tribune, Sagan talked about his then-new book The Demon Haunted World and was asked about his personal spiritual views: "My view is that if there is no evidence for it, then forget about it," he said. "An agnostic is somebody who doesn't believe in something until there is evidence for it, so I'm agnostic."
When asked how he would explain a "genuine mystical experience," Sagan responded: "Your question presupposes the existence of a genuine mystical experience and I'm not sure what that is. People have vivid hallucinations. How do you distinguish between altered states of consciousness?"
"It is said that men may not be the dreams of the Gods, but rather that the Gods are the dreams of men."
"Extraordinary claims require extraordinary evidence."
Asked soon after Carl's death: "Didn't [Sagan] want to believe?" She responded, "He didn't want to believe. He wanted to know." [Ann Druyan (Carl Sagan's wife)]
"It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring."