The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.Carl Sagan
One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle.Carl Sagan
It is said that men may not be the dreams of the gods, but rather that the gods are the dreams of men.Carl Sagan
We are star stuff which has taken destiny into its own hands.Carl Sagan
Books break the shackles of time.Carl Sagan
It takes a fearless - literally a fearless - mind to speculate about such transcendent matters.Carl Sagan
I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.Carl Sagan
Children are not only innocent and curious but also optimistic and joyful and essentially happy.Carl Sagan
We came from them. They are us. We are they.Carl Sagan
At the heart of science is an essential tension between two seemingly contradictory attitudes-an openness to new ideas, no matter how bizarre or counterintuitive they may be.Carl Sagan
Our knowledge is a little island in a great ocean of nonknowledge.Carl Sagan
No significant discovery or understanding of something significant about the Cosmos has ever been made by someone not testing and questioning.Carl Sagan