 An actual material thing, the soul is not a conceptual experience of silence. It's not happening in the head. It's happening materially in the body. Atman is a material thing. So you train yourself to sense that. Of course there is resistance in the system because who wants soul to be material? It's the only thing that is not tangible. So let it be that way. Let it be that silent vast. But it is not a silent vast. It is an impulse within the system.