In the vastness of space and the immensity of time, it is my joy to share a planet and an epoch with Annie.[Dedication to Sagan's wife, Ann Druyan, in Cosmos]

But our preferences do not determine what's true.

It's hard to kill a creature once it lets you see its consciousness.

We are one species. We are starstuff.

Humans are very good at dreaming, although you'd never know it from your television.