Quotes by Carl Sagan

"The brain is like a muscle. When we think well, we feel good. Understanding is a kind of ecstasy."

"Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works."

"I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star."

"The universe is not required to be in perfect harmony with human ambition."

"But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright Brothers. But they also laughed at Bozo the Clown."

"Absence of evidence is not evidence of absence."

"The universe seems neither benign nor hostile, merely indifferent."

"When you make the finding yourself - even if you're the last person on Earth to see the light - you'll never forget it."

"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring."

"Extinction is the rule. Survival is the exception."

"It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring."

"Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people."

"Somewhere, something incredible is waiting to be known."

"All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value."

"We've arranged a civilization in which most crucial elements profoundly depend on science and technology."

"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?"

"We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology."

"Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense."

"We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces."

"If you wish to make an apple pie from scratch, you must first invent the universe."