That's the thing with the brain you just never know where it will take you. On the other hand, have you every experienced nothingness, where the brain has gone completely blank, in my case it does that very quickly! It's that feeling of numbness, best described as nowhereness (if that was actually a word), a sensation of emptiness. In both situations, I ask where is my God are you in the silence or the busyness of my brain? If I'm honest I don't know, but I know He is not apart of the accusations that I hear in my head on a Sunday morning, "do you think you are any good", "you are a failure" or maybe that voice is saying, "you are beyond God's love".
To cut a short story even shorter, if you are struggling, there is probably someone else struggling and they could be sat next to you. Yes, God does communicate with us in many different ways and not always in our brains. He is always present, we just might not be aware of that sometimes.