More quotes by Carl Sagan

"A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism."
"Science is a way of thinking much more than it is a body of knowledge."
"We've arranged a civilization in which most crucial elements profoundly depend on science and technology. We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster."
"The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five."
"The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself."