No, it's not an answer. It's just a name for a the thing we don't understand, and (often) an implication that that thing is unknowable. If I ask "how are we conscious", and you answer "because we have souls", you haven't given me any new information. It sounds like new information, but it doesn't change anything about the predictions I will make for how the world behaves. It doesn't constrain my view of the observable universe, so it's useless.
Edit: also, you're describing substance dualism, not theism. You can be a dualist but not a theist.
Edit: also, you're describing substance dualism, not theism. You can be a dualist but not a theist.