There is a long tradition of imagining a god who is the greatest we can possibly imagine.
It stretches back into pagan thought and has even been adopted by Christians!
It is a very strange thing to do when the real, eternal God showed up in history, to be touched and handled.
There is no room for imagining any god, surely, once a real one has appeared!
However.... the appearance of all the fullness of God in bodily form did not stop religious philosophers from continuing their industry... and even a great Christian like Anslem got hooked into trying to conceive of the greatest god that could ever be conceived.
The obvious problem is trying to decide what are the great-making properties of the greatest god.
What qualities help to make a god greatest of all?
In 1 Corinthians, Paul openly acknowledges that being crucified is NOT a great-making quality for a god as far as human wisdom is concerned.
"We preach Christ crucified: a stumbling block to Jews and foolishness to Gentiles" - 1 Corinthians 1:23
"None of the rulers of this age understood it, for if they had, they would not have crucified the Lord of glory." - 1 Corinthians 2:8
Any god that ends up cursed and crucified could never be the greatest that can be conceived... surely!!
Ancient Greek philosophy found the idea of a Crucified God to be so foolish that such a god could not be taken seriously.
Islam, starting from the same philosophical foundation, arrives at the same conclusion - it is impossible for even a prophet of god to end up dying a cursed death of crucifixion.
What makes a god great?
Well, it all depends on what religious or philosophical culture we are in when we start to imagine a god.
The greatest god that Plotinus could imagine was an infinite One - spaceless, timeless, impersonal, unaware.
For him, all categories are imperfect... so the greatest god that can be imagined is beyond all categories and distinctions.
The greatest god that some moderns imagine is much more finite and connected to ideas of love, empathy, or compassion - and so very different great-making properties are suggested.
For Plotinus the greatest god would be utterly impersonal - but for many moderns the greatest god would be utterly personal (with a modern, psychological view of what a person is).
"Nowadays, perfect being theology has become a much more flexible tool, taking in or reflecting what God is like, which may be from various sources. Such theology is inventive in this bad sense, being about the idea of a God people would like to have, and reasoning about such a God." Paul Helm
https://www.thegospelcoalition.org/essay/god-the-perfect-being/
If the real, eternal, Living God became flesh and lived among us to be touched and handled, then surely the only rational strategy must be to abandon all theoretical ideas of divinity and find out the qualities and properties of the LORD Jesus Christ.
If the LORD of Glory was crucified then perhaps we need a different vision of perfection that can cope with the actual ways and works and wonders of the Living God.
In other words, don't we need to see what He thinks is perfect and work from that, revising all our own assumptions and categories in the process?
If we hang onto the old (or new) theories about divinity, we will always be frustrated - not just because we don't know what we are talking about but also because the Father actively frustrates human wisdom if it tries to discover divinity any other way than in Jesus.
"I will destroy the wisdom of the wise; the intelligence of the intelligent I will frustrate.”
1 Corinthians 1:19 (Isaiah 29:14)
"The wisdom of this world is foolishness in God’s sight. As it is written: “He catches the wise in their craftiness” (Job 5:13); and again, “The Lord knows that the thoughts of the wise are futile.” (Psalm 94:11)"
1 Corinthians 3:19-20
Isaac Watts found that the greatest god that can be conceived is in fact the God who is crucified - even if that will always seem foolish, impossible and scandalous to human wisdom.
When I survey the wondrous cross
on which the Prince of glory died,
my richest gain I count but loss,
and pour contempt on all my pride.
Forbid it, Lord, that I should boast
save in the death of Christ, my God!
All the vain things that charm me most,
I sacrifice them through his blood.