"I... I've never told anyone, but... I've always thought they were lighthouses.
"Billions of lighthouses... Stuck at the far end of the sky."
("Wow, it must be so lively up there.")
"But it isn't.
"They can see all the other lighthouses out there, and they want to talk to them. But they can't, because they're all too far apart to hear what the others are saying.
"All they can do... is shine their lights from afar... So that's what they do... They shine their lights at the other lighthouses... and at me."