Carl Sagan — "A book is made of paper, ink, and imagination. It is a portal to new worlds and …"

"The cure for a fallacious argument is a better argument, not the suppression of ideas."

"...how is it that hardly any major religion has looked at science and concluded, 'This is better than we thought! The Universe is much bigger than our prophets said, grander, more subtle, more elegant…"

"Our loyalties are to the species and to the planet. We speak for Earth."

"The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together."

"The price of skepticism is that you are occasionally fooled. The price of credulity is that you are often fooled."