Dr. Carl Sagan Quotes

"Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgment, the manner in which information is collected and used."
-Dr. Carl Sagan in Wisdom quotes.

"... the use of our intelligence quite properly gives us pleasure. In this respect the brain is like a muscle. When we think well, we feel good. Understanding is a kind of ecstasy."
-Dr. Carl Sagan in Understanding quotes.

"We are star-stuff."
-Dr. Carl Sagan

"You have to know the past to understand the present."
-Dr. Carl Sagan in Understanding quotes.

"We are the product of 4.5 billion years of fortuitous, slow biological evolution. There is no reason to think that the evolutionary process has stopped. Man is a transitional animal. He is not the climax of creation."
-Dr. Carl Sagan

"We are like butterflies who flutter for a day and think its forever."
-Dr. Carl Sagan