Note the plural ....Could not restrict myself to just one quote by Carl Sagan.
But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright Brothers. But they also laughed at Bozo the Clown.
A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.
Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.
It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.
Somewhere, something incredible is waiting to be known.