Martin Heidegger investigated the word being and found that it is almost always associated with substance, as the most fundamental term in philosophy itself. But the Greek term ousia, or more fully parousia, corresponds with presence.
This designates a homestead, a self-enclosed standing-in-itself. Something is present to us. It stands steadily by itself and thus manifests itself. It is.
From this, he destructs conceptions of ‘nature’ from the term meta-physics (physis). Physis means the emerging and arising, the spontaneous unfolding that lingers. In this power rest and motion are opened up out of original unity. This power is the overpowering presence that is not yet mastered in thought, wherein that which is present manifests itself as an essent. But this power starts from concealment and aletheia is the unconcealment when the power accomplises itself as a world.
It is through world that the essent first becomes essent.
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