Authors:

We have no need of other worlds. We need mirrors. We don't know what to do with other worlds. A single world, our own, suffices us; but we can't accept it for what it is.

"Solaris". Book by Stanisław Lem, translated by Joanna Kilmartin and Steve Cox. Chapter 6: "The Little Apocrypha", p. 72, 1970.
We have no need of other worlds. We need mirrors. We don't know what to do with other worlds. A single world, our own, suffices us; but we can't accept it for what it is.