Dualism states that the mind is separable from the body as a soul, materialism states that the mind is created by the brain functioning as normal. Both of these explanations have glaring issues. For Dualism, when is it that a function of the mind is part of the brain and when is it that it's your soul, or for materialism, how exactly does the brain generate qualia or allow for original creation. And if materialism is the case, then how is it still possible to easily argue for Descartes' idea of animals being nothing but biological machines working off of reflex and instinct. Shouldn't they be like us, but lesser?
Well, what I propose is that your qualia, your being is like a soul, and will continue on past this realm of existence. But everything that makes you into you is part of your brain. Allow me to explain:
We have a man named John Doe. He has hobbies, a personality, family, etc. When he dies. He dies. John Doe is destroyed. However, the being that controlled John Doe will never die and is eternal. Presumeably that being could recreate John Doe as a vehicle to control again. But for now, John Doe is just a recollection of events. Everything that made John who he is, was his brain and how it worked.
Basically, your brain and body and their function is instrumental to your personality and being in this world, but your qualia is separable from that. It's why brain damage can impair you beyond any logical reasoning, yet someone with half a brain doesn't have any less qualia than someone with a full brain. And is also how animals with larger brains than ourselves aren't showing any definitive signs of sapience either.
Anyways, without a brain, you can't think, right? So how would you think and be able to create without a brain? Simple, your brain allows you to have a permanence of thought within this reality where time is a factor. You see, at any given point in the present you are having a coherent thought, but in order to function in this world you need to be able to retain that. It's why Alzheimers patients are still able to do some things and exist as somewhat of a human despite being practically non functional. At any given point in the present they have a totally coherent thought in their head, but their brain is ill-equipped to retain that thought to any point where it could be used or acted upon and thus they become non functional.
It means that when there isn't time anymore, when you aren't in this reality, you don't need a brain to think because there's no longer a requirement for any permanence of thought. This hypothesis goes into my previous statement of dualism combined with materialism by saying that the ability to think like we do originates from our soul but the reason why we can then measure and quantify that in your brain is because the brain is responsible for retaining that thought and allowing you to act upon it and work on that thought within this reality where time continually moves around us.
Think of the brain as being like some kind of translator or set of tools allowing us to operate within a reality where time is a fundamental mechanic. Like a hazard suit or something, I guess.