(from wikipedia) In Mark Twain's "The Mysterious Stranger," the character Satan makes the following statement of solipsism at the end of the novella, "In a little while you will be alone in shoreless space, to wander its limitless solitudes without friend or comrade forever—for you will remain a thought, the only existent thought, and by your nature inextinguishable, indestructible. But I, your poor servant, have revealed you to yourself and set you free. Dream other dreams, and better!...You perceive, now, that these things are all impossible except in a dream. You perceive that they are pure and puerile insanities, the silly creations of an imagination that is not conscious of its freaks - in a word, that they are a dream, and you the maker of it. The dream-marks are all present; you should have recognized them earlier. It is true, that which I have revealed to you; there is no God, no universe, no human race, no earthly life, no heaven, no hell. It is all a dream - a grotesque and foolish dream. Nothing exists but you. And you are but a thought - a vagrant thought, a useless thought, a homeless thought, wandering forlorn among the empty eternities!"
This gets me to wonder if Twain, an atheist, may actually be quite close to the mark, so to speak. At times, it seems the road to hell is paved with solipsistics, but perhaps the lost human soul in eternity comes to a situation thinking much like what Twain describes. Alone, homeless, wandering, never to have reconciliation, or communion again.