FOUNDATION of ONTOLOGICAL REALITY
Something obviously exists. The question is why or how something exists. Either something came from nothing, or something is eternal. It is not possible that something came from nothing. Therefore at least one thing is eternal.
It cannot be known how many things are eternal, nor if one is Supreme.
Powerful beings exist. Therefore a most powerful being exists.
The most powerful being may not necessarily be more powerful than a coalition of other beings.
Therefore, from the existence of power, it cannot be known if a Supreme Being exists or not.
Every particular thing is either homogeneous, or it contains parts.
Multiple things exist.
Some of those things come from something else.
Therefore that from which those multiple things come must contain parts.
Therefore at least one eternal thing must contain parts.
An eternal thing may contain eternal and temporal parts.
or temporal things were created by something eternal,
or some temporal things are part of something eternal,
It is not possible to create power without first having power.
Therefore power must be an eternal part of the original Creator.
Only something eternal can have an eternal part.
Therefore the original Creator must be eternal.
Humans can create machines which are greater than humans in any quantifiable attribute. Therefore even a Supreme Being could create beings which are greater than Himself in any quantifiable attribute, possibly including power, though He would no longer be supreme after having done so.
Relative to this (Big Bang) universe a most powerful being exists, which may be unrelated to the most powerful of eternal beings. I see no way to know, or reason to care, if the most powewrful Being relative to this universe is Supreme (even relative to this universe).
From lack of a serious contender, it may be assumed that the Being who inspired the Bible is a Being with whom we have to deal, whether that Being is most powerful relative to this universe or not. But we cannot know how accurately the Bible represents Him – especially considering that later parts of the Bible often update (for those who can’t tolerate the word contradict) earlier parts of the Bible.