In principle, when we distinguish being from beings, we transcend the realm of things that are. It is not that we go to some other world beyond the world we know, or enter into some different realm of beings. Such notions constitute, for Heidegger, a vulgar form of metaphysics with which true philosophy (metaphysics as science) has nothing in common. Philosophy does not go beyond beings ontically to other beings that dwell beyond or behind. It transcends beings ontologically in the direction of being.
All things that are in the world are linked together, one way or the other. Not a single thing comes into being without some relationship to every other thing. Scientific intellect thinks here in terms of natural laws of necessary causality; mythico-poetic imagination perceives an organic, living connection; philosophic reason contemplates an absolute One. But on a more essential level, a system of circuminsession has to be seen here, according to which, on the field of Śūnyatā, all things are in a process of becoming master and servant to one another. In this system, each thing is itself in not being itself, and is not itself in being itself. Its being is illusion in its truth and truth in its illusion. This may sound strange the first time one hears it, but in fact it enables us for the first time to conceive of a force by virtue of which all things are gathered together and brought into relationship with one another, a force which, since ancient times, has gone by the name of "nature" (physis).