Quotes by Carl Sagan
The universe is not required to be in perfect harmony with human ambition.
When you make the finding yourself - even if you're the last person on Earth to see the light - you'll never forget it.
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.
A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.
Where we have strong emotions, we're liable to fool ourselves.
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.
Imagination will often carry us to worlds that never were. But without it we go nowhere.
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
The universe seems neither benign nor hostile, merely indifferent.