More quotes by Carl Sagan

"Somewhere, something incredible is waiting to be known."
"The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself."
"I don't want to believe. I want to know."
"I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves."
"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."