I'm gonna keep this real basic. You can look more into it if you'd like. You have a conscious and subconscious brain. The theory is you start with just a subconscious which isn't verbal and basically acts like a sponge. As your brain develops you form a conscious brain, and your subconscious gets relegated to memory storage and dreaming. Enslaved if you will. The subconscious seems to depend on the conscious to express itself while you're conscious, but it really shows itself when you dream. People with PTSD find weed extremely helpful because it seems to inhibit the communication between your subconscious and conscious. All those horrible memories of agonal breathing and the stench of blood are sort of locked away. The problem is the subconscious will get very frustrated, and when it erupts and tries to express itself it can seem like delusions or schizophrenia. The real problem is that you lock that shit away instead of dealing with it. Mushrooms seem to do the opposite. They make your brain fire more, and in ways it never normally does. It allows you to think about things you've tried to ignore in ways you've never imagined before. If I smoke weed, I don't remember my dreams. I'll wake up aggro or extremely depressed sometimes with no real idea why. Just a profound sadness or aggression. That's the subconscious struggling to express itself to my drug addled conscious. If I do mushrooms, I cry. I think about everything my conscious tries to avoid, and I ask myself why I did those things, and it helps me survive. Realistically, according to my beliefs and morals, I shouldn't be alive. But I am, and the more I stare that shit in the face, the more I can accept it, whether or not I ever find forgiveness.