Attention is attention to, but it also attention of (subjective genitive). If what it attends to has an unverifiable component of reality, of what can be bracketed without in any way affecting the flow of attentional living, then this is just a reflection of something assumed and unverifiable in what it is attention of, the implicit self, the unconscious burden of being that is carried along with. This self-notion is anchored in the body, the objective correlate of presence here and now, but the body does not have a special ontological status different from anything else that comes under attention to. You know you are there only because you can direct your attention towards the inner touch of your presence. Thus objective being is underwritten by subjective being which turns out to be nothing other than objective being inside out. Subjective being thus is empty, you don't carry it on your back, it is not even an illusion because there is no subject to be subjected to that illusion. Attention is complete in its object without any need to lean upon a subject such as could never serve in the non-existent role of ground. What then do you think it does? Only so that you can enjoy its modes of vanishing, all enjoyment being just the play of its initiated dissolution.