Imagination will often carry us to worlds that never were. But without it we go nowhere. – Carl Sagan
A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism. – Carl Sagan
If we long to believe that the stars rise and set for us, that we are the reason there is a Universe, does science do us a disservice in deflating our conceits? – Carl Sagan
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous. – Carl Sagan