Carl Sagan

The notion that science and spirituality are somehow mutually exclusive does a disservice to both.

Carl Sagan

The politicians and the religious leaders and the weapons scientists have been at it for a long time and they’ve made a thorough mess of it. I mean, we’re in deep trouble.

Carl Sagan

The prediction I can make with the highest confidence is that the most amazing discoveries will be the ones we are not today wise enough to foresee.

Carl Sagan

The sacred truth of science is that there are no sacred truths.

Carl Sagan

The secrets of evolution, are time and death. There’s an unbroken thread that stretches from those first cells to us.

Carl Sagan

The simplest thought, like the concept of the number one, has an elaborate logical underpinning.

Carl Sagan

The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.

Carl Sagan

The universe forces those who live in it to understand it.

Carl Sagan

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

Carl Sagan

The very act of understanding is a celebration of joining, merging, even if on a very modest scale, with the magnificence of the Cosmos.

Carl Sagan