Access to matter is quite specific and difficult to explain. Everything, of course, depends on the point of view of the observer. Access to matter - stable matter - requires a multi-faceted explanation. In order to explain it, one should ask: if I stand on a high mountain and look at the horizon, do I have access to the Reality around me or is there only a kind of illusion (sounds like Optical Illusion)? Do you have access to what you see (perception of Reality)?