More quotes by Carl Sagan

"The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself."
"A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism."
"If it can be destroyed by the truth, it deserves to be destroyed by the truth."
"There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths."
"[When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996:]If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses."