More quotes by Carl Sagan

"Science is based on experiment, on a willingness to challenge old dogma, on an openness to see the universe as it really is. Accordingly, science sometimes requires courage - at the very least the courage to question the conventional wisdom."
"It's a lazy Saturday afternoon, there's a couple lying naked in bed reading Encyclopediea Brittannica to each other, and arguing about whether the Andromeda Galaxy is more 'numinous' than the Ressurection. Do they know how to have a good time, or don't they?"
"A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism."
"Somewhere, something incredible is waiting to be known."
"There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths."