If the nature of God is tripartite, that nature must be eternal. A infinite-limitlessness can not be 'sometimes this' and 'at no time that'.
The vastly different natures of the biblical god-father and the god-son are seen in the wrathful vengeance of God vs the love from God.
Which nature is absolute and existent before, during, and after creation?
Attributes, qualities, adjectives are meant to distinguish one thing from another thing on the same order of reality; the red rose flower, not the lilac colored lily flower.
A 'one and only God' can-not-be compared to another 'one and only God.
God may have an essential nature, a irreducible identity*, but no qualities or attributes.
Indeed all that exists must essentially borrow 'existence' from the pre-existent.
Assuming that by God we mean a 'conscious-being', then our own 'conscious-existence can not be separate from that.
* Some posit that the essential nature of Divinity is a trinity of "Existence-Consciousness-Limitlessness"; a blissful-being, unlimited by any 'otherness' that could constrain the joy.
Homework challenge: Negate your own conscious existence. Show your work.
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