Who says God is abstract and unknowable?
Old Testament- God can manifest as a physical being and interact with the world
New Testament- God is a being who rules over heaven
Contemporary philosophers- God is abstract, unknowable, exists beyond reality, exists as a set of rules or laws, exists as the universe itself, is not part of reality at all, is a concept beyond our understanding, is immeasurable, etc.
In this last category, what philosophers started describing God as an abstract concept? Descartes is one example, Thomas Aquinas is another. Who else? It seems over history the idea of God has moved from something that can be manifested and seen to something immeasurable and outside observability. I'd like to know how this idea of God was presented by different philosophers and how these ideas have evolved over time.