Where we have strong emotions, we're liable to fool ourselves.

"Science is not only compatible with spirituality; it is a profound source of spirituality."
-Carl Sagan

"Somewhere, something incredible is waiting to be known."
-Carl Sagan

"The universe is not required to be in perfect harmony with human ambition."
-Carl Sagan

"Absence of evidence is not evidence of absence."
-Carl Sagan

"In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams!"
-Carl Sagan

"Think of how many religions attempt to validate themselves with prophecy. Think of how many people rely on these prophecies, however vague, however unfulfilled, to support or prop up their beliefs. Yet has there ever been a religion with the prophetic accuracy and reliability of science?"
-Carl Sagan