We are prodding, challenging, seeking contradictions or small, persistent residual errors, proposing — Carl Sagan
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous. — Carl Sagan
It seems to me what is called for is an exquisite balance between two conflicting needs: — Carl Sagan
But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. — Carl Sagan