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.
"Nothingness" is generally forced into a relationship with "being" and made to serve as its negation, leading to its conception as something that "is" nothingness because it "is not" being. This seems to be especially evident in Western thought, even in the "nihility" of nihilism. But insofar as one stops here, nothingness remains a mere concept, a nothingness only in thought. Absolute nothingness, wherein even that "is" is negated, is not possible as a nothingness that is thought but only as a nothingness that is lived. It was remarked above that behind person there is nothhing at all, that is, that "nothing at all" is what stands behind person. But this assertion does not come about as a conceptual conversion, but only as an existential conversion away from the mode of being of person-centered person. Granted what we have said about the person-centered self-prehension of person as being intertwined with the very essence and realization of the personal, the negation of person-centeredness must amount to an existential self-negation of man as person. The shift of man as person from person-centered self-prehension to self-revelation as the manifestation of absolute nothingness - of which I shall speak next - requires an existential conversion, a change of heart within man himself.
People give names to persons and things, and then suppose that if they know the names, they know that which the names refer to.
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).