One of my favorite invocations is:
"But God is He having the Head of a Hawk. The same is the First, incorruptable, eternal, unbegotten, indivisible, the dispenser of all Good. He is the best of the Good, the wisest of the Wise. He is the Father of Equity and Justice, self-taught, physical, perfect and wise, He who inspires the Sacred Philosophy."
Setting the old Platonic refrain aside, one might ask: what do hawks have to do with anything? They circle, they brood, they watch, they dive down upon their prey like lightning and then disappear in the sky. The invocation states paradoxical qualities, but doesn't resolve anything, I admit, but it has a certain utility in terms of conjuring an identification. My feeling is that the invocation is more of a ritual assertion to be recited with a stamping foot: "God is a Verb".
I can say that while I believe in God as an emotional certainty - that is, a Supreme Being that gets tagged with that generic name - I cannot really answer anything about where "His" power comes from, how He got so powerful, nor can I prove Divine existence-agency logically, beyond all doubt. Maybe I am sentimental, which is interesting because submission to God is often seen as a pre-requisite to understanding God.
"Negative theology" yields an interesting contemplation for me (the "Sacred Philosophy" as an unending koan, I suppose) but there are no "answers" there, no rest in Reason, just paradoxes in regress. And I won't even settle for the line-drawing notion that He exists because I have an idea of Him - such an existence-non-existence would be completely independent of anything I can conceive. But I do know that Power exists, and that everything that manifests does so because it is the product of, or is subservient to, a so-called "higher principle" - be it hypostatic-spiritual resolving into the "Absolute" or just plain old Nature, of which I don't think humanity has a real definition of beyond "necessary truth" (exacted via contradictions) the more immediate contingency of our survival as fleshlings (earthquakes and tyranny). Hey, maybe this is how God got so powerful with us, historically speaking, setting our mundane existential terror aside - that the unending paradox of "to be or not to be" is, in fact His Glory!