I often hear music late at night. Music that's not being played, music in my head. It's rather like a dream, I can't direct it and can't escape it. Mostly classical, sometimes rock. Right now it's the sound of musicians in an orchestra tuning their instruments... you know, when they all play the same note at the same time. Sometimes it's the sounds of a river flowing, and sometimes it's people talking, or laughing. It's possible that people actually are talking and laughing. It's hard to tell what's real and what's not.
Like the time I lost my grip on reality. I had been doing a puzzle and was looking for an owl head and couldn't find it. The next day at work I saw a big carved wooden owl and thought, 'There it is! All this time the puzzle piece was in Longs... I wonder if the other pieces I can't find are strewn around town.' That would be rather interesting, except I can hardly find things in my house, let alone at Longs, so I'll try not to think about having to find things around town. At the same time... if someone was very dedicated and had lots of time or if it were a group effort, it could be a very rewarding pastime. Each person would hide a given share of pieces around town, then each would have to find as many pieces as they could, but not their own. And the pieces would be color-coded so everyone would know if someone cheated. And then they'd glare at the perpetrator and turn their backs and walk away. It's always more rewarding to be honest. You never know when someone's going to be checking up on you.
Or maybe there is no reality at all. Each person has their own reality, and their way of thinking and actions revolve around it. If, say, you believed the devil lived in Minnesota, that would be a fact to you. It would be real. And chances are you'd stay away from Minnesota.
Therefore, it must be true that no one lives in the real reality.
Which is a bit of a pity.
But at the same time, what horrors would exist for that person, to know that everything the know and believe is absolutely true, that there is no way the could be wrong? And what an arrogant snob that person would be.