The Hubble telescope's main 100 inch mirror taking tiny pictures of a 156 billion light years wide universe has a better chance of seeing the whole cosmos at once than any man has in imagining the fullness of the Godhead with his puny, mortal mind.
And yet God the Father reveals Himself to us in four ways: by Jesus Christ His only begotten Son, by the indwelling Holy Spirit, by His words in Scripture and by the Creation both spiritual and physical.
That one having received these revelations speaks with geometric metaphors should not be offensive to one who speaks with water, steam, ice metaphors which should not be offensive to another who speaks with a wheel metaphor and so on.
Metaphors use sensible objects to represent things which are beyond mere sensory perception. They convey in ways that words alone cannot (e.g. prophesy) and for that reason, they also can hide truth in plain view (e.g. parables.)
The bottom line is that only God knows "all that there is" - and He reveals Himself to each of us, personally, according to His own will. Our cognition (both spiritual and physical) is a gift of God.
Maranatha Jesus!