I don’t know, but I have often had some of my most profound thoughts in a dream. I have solved all sorts of work, theological problems from dreams. It is strange, but I do not believe it is spiritual, though I might have 3+ years ago.
Very fascinating, though. Many believe that sleep reorganizes the brain, which appears to be true. That the brain solidifies pathways during sleep. A musician can struggle on a piece the first day, ending with playing it sloppy and slow only to find that after a night of sleep, they can effortlessly play it, or at least play it with far more precision. Some cool things happen when we get sleep, it is too bad many people don’t see the value and try and short change sleep. Even worse is when people think others are lazy for making it a priority. I remember Jesus making it a priority, enough that he was like, “see ya guys, gonna take a nap…”