Carl Sagan's explanation here of how we perceive things that are beyond our own dimension is useful for explaining how we perceive God.
In the 2D vs. 3D example, God is akin to the apple and we are the square.
In the 3D vs. 4D example, God is akin to the tesseract. Just as we can see a "shadow" of a tesseract but have no way of comprehending the tesseract itself, so it is for our perception of God - our experience and understanding of him is merely a "shadow" of what he truly is.
Too often, atheists try to argue against God by appealing to the rules of our own dimension, but this is as misguided as the square trying to argue that the apple cannot exist.
Hopefully this helps some of you gain a more accurate conception of what we're discussing when we discuss God.
I can help Dr Sagan see deeper than he is with my theory of connected space-time, versus separated space and time. The latter is composed of space that is independent of time and time that is independent of space.
If we could move in space, independent of time, we would be omnipresent. We can move around the universe in zero time since position is not time dependent; warp drive. This is a classic attribute of God. Separated space and time is the math needed to express God. It only requires a simple change in our current view of space and time. Connected space-time places limits on space and time, making space-time a subset of the much larger set, where time and space are not attached.
As an analogy, say you were handcuffed to your mate. Your were role playing last night and lost the key. You decide to clean the house to find the key. The constraint, created by the handcuffs; space-time, will place limits on how the two of you, can move about in your home space and time while cleaning. You will always need to stay together, to do one thing at a time, or maybe two things in the smaller space volumes; clean and dry the dishes.
Luckily for the two of you, you find the key in the fridge next to the wine. You take off the handcuffs and decide that cleaning the house is still a good idea. Once separated, the possibilities for cleaning the house, are now much more flexible. I can clean upstairs, while my mate cleans downstairs, so we are not in each other's way. God, by being omnipresent, does not have to be in one spot at a time, handcuffed to space-time, to suit the science of space-time. One needs to model this extra flexibility, differently.
If we combined connected space-time; handcuffs, with separated space and separated time; no handcuffs, this would be like two couples cleaning a vacation home, looking for the key to the handcuffs that bind the other couple. Now more options for finding the key can also open up. Having the other couple in two places at once is now possible even of not so for the handcuffs couple. This is an easy way to model the quantum universe and the macro universe, at the same time, both working together, interacting.
For example, all forces of nature will create an acceleration, which is d/t/t or two parts time and one part space. This can be modeled as space-time, plus separated time. We have the limits of space-time, as well as a time variable that is not dependent on space. The law of physics should be the same in all references, with each unique reference, adjusting theses laws to its unique relativistic frame; the scenario says both things.
The inflation period of the universe could be modeled as space-time plus distance potential. This would add an omnipresent affect to our early space-time universe, that at one time appeared to expand faster that the speed of light. Now it has no center, but expands in all directions at all points, independent of time.