How does Buddhism explain the generation principle of dreams?

The Buddha said in the Buddhist scriptures that dreams have four reasons, that is, the heart will show dreams. The first is the accommodation industry, which was created in the past. Sometimes I have never seen or thought about this state of love. Why did I have this dream? I've never seen it in my life. I thought about it in my last life. You know there are seeds in Araille, and seeds are effective. You should know that when you sleep, it is best to be awake. When you are awake, your will is easier to control. When sleeping, the will can't be controlled. I can't control it, so many people have many karma before the robbery, and sometimes they will appear. If I can't control it, I will have many strange dreams, and these dreams will appear. Then the second kind is delusion, and when the mind is distracted, it will dream. When we are paranoid, we often say that it makes sense to think about it day and night. What about the third one? Dreams with omens are things that will happen in the future, the day after tomorrow or a few months later. You appear in your dream, which is an omen dream. So the cause and effect of III is true, not false. If you can't pass III, how can there be an early warning? This omen is the future. How can the future be known? Therefore, it is causality that determines the third life, past, present and future. Fourth, ghosts and gods dream and ghosts dream. This is also a reason. If we dream about the past, or if we are friends of our families, it is clearly written in the Tibetan scriptures. Anyone who dreams of these things wants to ask you for help when he is in trouble and pain. The dream about this, we who study Buddhism all know, all know this situation. Then the next day we can read him a scroll of scriptures, or read him a thousand Buddhist names hundreds of times.