If God was small enough for us to understand Him then He would not be God.

Sounds like you know what God is like even though you've never met the dude. Or is it chunkless?

We have an abstract mind, we can and do come up with, well, nonsense all the time. There're so many fantasy books out there... Could you clarify how exactly we could not understand it? As we do have the capacity, as our minds are not limited by the rules of this existence, as we can come up with notions that contradict our reality.