All go to the soul. What’s important is the Master. Whenever you remember the Master, He will send, if the Master is a very highly developed person, highly realized person, He can send energy, to help you to meditate. If we know the human brain completely (How to work). Then we can discover also spiritual aspect.(Yes.) There is something that makes the brain function. And that something is what the Buddhists call Buddha Nature. It’s not the physical brain really. It is something hidden within the physical apparatus.