Benjamin Sisko: I have begun to wonder. What if it wasn’t a dream? What if this life we’re leading – all of this, you and me, everything – what if all of this… is the illusion?

Joseph Sisko: That’s a scary thought.

Benjamin Sisko: I know, I know… But maybe, just maybe, Benny isn’t the dream. We are. Maybe we’re nothing more than figments of his imagination. For all we know, at this very moment, somewhere, far beyond all those distant stars, Benny Russell… is dreaming of us.

Star Trek: Deep Space Nine, Season 6: Episode 13 – “Far Beyond the Stars”