1,131 Quotes by Carl Sagan

I hold that popularization of science is successful if, at first, it does no more than spark the sense of wonder.

What began in deadly competition has helped us to see that global cooperation is the essential precondition for our survival. Travel is broadening. It's time to hit the road again.

Books permit us to voyage through time, to tap the wisdom of our ancestors.

Football is a thinly disguised re-enactment of hunting; we played it before we were human.

Frederick Douglas taught that literacy is the path from slavery to freedom. There are many kinds of slavery and many kinds of freedom, but reading is still the path.

In Italy, the Inquisition was condemning people to death until the end of the eighteenth century, and inquisitional torture was not abolished in the Catholic Church until 1816. The last bastion of support for the reality of witchcraft and the necessity of punishment has been the Christian churches.

Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.

In a lot of scientists, the ratio of wonder to skepticism declines in time. That may be connected with the fact that in some fields-mathematics, physics, some others-the great discoveries are almost entirely made by youngsters.

Valid criticism does you a favor.