As scientists discover more about the Universe, the hard and fast rules of physics seem to be less so. The ironclad constants are not so constant, particles can both exist and not exist at the same time, and it turns out God does, occasionally, play dice with the universe. There are theories now that say that we exist in one of many pocket universes, each one existing by a different set of laws. These universes that would be beyond what we can possibly imagine.
We are too bound by the physical laws of this world to conceptualize something completely and utterly different. It’s the same problem when we try and imagine what an alien looks like. We give them two eyes, a nose and a mouth. We can’t help but imagine that whatever lives on another world must, fundamentally, resemble us in some fashion. Really, they could have fifteen noses on the soles of their tentacles which are connected to an amorphous blob made entirely of silicates and lumpy diamonds.
The fact that we have trouble conceiving alien life within our own universe doesn’t bode well for what we think another universe might have in store for us. There could be nameless wonders that defy all description; things so beyond our ken that their very existence can break rational thought. Even the idea that there could be other universes besides our own begs the thought; what eldritch things lurk beyond our own space?