This is going to be really hard for you to accept, but there is no physical world as we know it. The universe is a shadow box, a kind of virtual theatre. In the even larger room that our universe resides in is a place that is everything. That “everything” is both boundary-less container and also the contents of that container. There is no void. All this talk of emptiness versus nothingness is just confusion and noise. It is a contemplation that simply distracts from truth, and consumes attention and your time, like much else in our universe. Those wise historical traditions of mystic and spiritual teaching have an agenda to maintain their own status quo. Human beings have learned almost nothing from those teachings, because ultimately they aren’t teaching anything at all. The truth you are trying to seek is being deliberately obscured. It is common sense. It is like the contemplation of the glass being half full or half empty. The pursuit is meaningless.