I'm discounting the existence of ghosts or spirits, instead postulating that the physical systems of the body are all that are required to constitute mind and m

I'm discounting the existence of ghosts or spirits, instead postulating that the physical systems of the body are all that are required to constitute mind and mental functioning. I don't think that gives us any answers to the questions we have about how mental health and illness work and can be influenced, because we don't know how these systems work to create mental life in any great detail. It does, however, rule out various possibilities that mysterious forces can cause mental dysfunction. In other words, the answers to questions about mental health can be found in the physical systems of the body, and our knowledge of these systems is increasing all the time. So that is reason for optimism. I'm not sure if that addresses your questions or concerns, or not. If I am missing your question or your point, could you kindly spell it out more clearly for me?