The thing about DDS is, that God is not one of us. By that I mean, He is not a being among other beings.
He is not the highest ‘being’, at the top of the chain of being; not the smartest being, or the biggest, or strongest being. Not a being at all. This is important because to be a being is to be dependent on some other thing as to one’s existence, as to whether one is necessary or not.
So God is BEING itself, the power of being, He is not dependent on anything or anyone. He does not even exist. He is existence. All being, all existence, flows from him and is utterly dependent on Him to maintain its existence and being.
Tillich calls this God the “God beyond the God of theology”. This God is the ground of everything else, the source of everything else, but is not Himself a thing.
Nor is He made up of parts. Dang, that’s a hard one to explain. His simplicity resides in the fact that all his perfections are One, unlike his creatures who are a mixture of properties of different sorts that often battle one another, as our personalities are unbalanced, generally.
So…the next step is that He does not change. At all. He is eternally exactly who He is, the fount of all perfections, all beings, all graces and all agape. He apparently - and I’m not sure about this - does not have successive thoughts or moods, because that would entail change.
Heading for the deep end of the pool here - it’s impossible to explain this in a paragraph or a book.
Parts of the DDS I buy into and understand; there are however impossible contradictions that flow from this as well.