Then give me evidence otherwise, that the mind doesn’t depend on the brain to exist. I don’t know why that is so hard, except perhaps that you can’t? I HAVE looked at a lot of theories in philosophy of mind. The one you’re proposing fails Occam’s Razor - you’re proposing an entity that doesn’t need to be there for it all to make sense.
Now I get, you want there to be a soul so you’re apt to accept it. But you keep repeating “how do you know.” I’ve explained step-by-step the abductive reasoning I’ve used - reasoning to the best explanation of the various observations we do in fact make. Let’s try some counterfactual reasoning - If the mind resides in the soul then damage to the brain wouldn’t hinder the mind. Now you will probably say something about functional rather than existential, but that’s entirely ad hoc - just something you need to make your idea float. That’s how how philosophy works. At least, when philosophy does go that way the theory gets savaged by other philosophers at the next philosophy conference. Your reply could easily be attached to anything - You can’t assume materalism in gravity! The World-Soul is where gravity resides. You can’t say the functional dependency of gravity on mass is the same thing as the existential dependency! Prove there’s a connection!
You’re speaking in ridiculous circles.