I don’t make the distinction between “physical” and “non physical”.
Materialism makes explaining almost anything extremely difficult.
Personally, if I were to believe in God, I would think it was also made of something that would follow certain properties (maybe these would be the necessarily-true properties), that these properties would through interactions within God give rise to its mind, and that in order for God to cause/intervene in the universe it would have to have some ability to interact with our “stuff”. The interaction could be mediated by something we can’t conceive, but it would still have to be mediated by something.
If I thought that God would have to be made out of matter if He were to exist, I too would be an atheist. St. Augustine excoriates his younger self for believing a theory by which God was simply extremely rarefied matter. It is a philosophically incoherent view (somewhere around books 5-6 in the Confessions, I think).
I recommend that you read St. Augustine’s Confessions. Besides being great literature, and very insightful about human psychology, you might find his treatment of this problem helpful.
I have a fundamental problem with 2 entities (the known universe and God), that are made of fundamentally different stuff with no connection. As long as a connection exists, it’s not really 2 distinct entities, but really 1.
God is not made of stuff. Perhaps there is a problem with two things made of very different stuff of interacting, but God is not made of stuff.
The evidence that mind=brain activity is overwhelming. Certain brain injury takes away a person’s morality, medications affecting the brain can change personality, pretty much all functions of the human being like language, like movement are tied to particular areas of the brain, memory is located in the brain, and damage can take away memory and strip a person of much of what they are and so on.
There are two theses which are equally compatible with such evidence.
I. The mind is wholly material.
II. The mind requires something material for its operation.
Note that under
either of these theses your counterexamples are completely accounted for. If it is necessary for me to have a functioning brain in order to think (take thinking in the broad Cartesian sense to include everything else), despite also having an immaterial intellect (this is the classical Aristotelian position), then it would be the case that whenever my brain is damaged, I would be impeded in my ability to think.
But if that’s the case, then strictly speaking none of your examples count as “evidence” for thesis I over thesis II. Thus the claim that there is “overwhelming evidence” that the mind is only material is spurious. In fact, there is
no evidence that the mind is wholly/only material.
Because the natural world is the only thing that I’ve ever experienced. There is no evidence that there’s anything else.
Note that there is a distinction between your two sentences. If by, “that’s all I’ve ever experienced” you mean that you’ve
literally never had sense experience of something immaterial, then you’re absolutely right. Strictly speaking nothing immaterial is susceptible to being taken in by any of the senses.
But that doesn’t mean that one cannot have
evidence of such things.
-Rob