Carl Sagan

All inquiries carry with them some element of risk.

Carl Sagan

All of the rocky and metallic material we stand on, the iron in our blood, the calcium in our teeth, the carbon in our genes were produced billions of years ago in the interior of a red giant star. We are made of star-stuff.

Carl Sagan

Any faith that admires truth, that strives to know God, must be brave enough to accommodate the universe.

Carl Sagan

Books are like seeds. They can lie dormant for centuries and then flower in the most unpromising soil.

Carl Sagan

Books break the shackles of time, proof that humans can work magic.

Carl Sagan

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

Carl Sagan

Every cell is a triumph of natural selection, and we’re made of trillions of cells. Within us, is a little universe.

Carl Sagan

Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.

Carl Sagan

Every star may be a sun to someone.

Carl Sagan

Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.

Carl Sagan