Physicists and mystics galore have pondered over the question perennial “what lies beyond the universe?” Why did this question come up? Simply because we imagine the universe to be “in” something, to be part of something. There is something beyond the fish because you imagine the fish to be “in” something… in water.
Let me take a different view here… instead of thinking that the universe is in something, what if we took the approach that the universe is “the” thing, the universe is everything…
The question of what lies beyond the universe now sounds so out of place and irrelevant… stupid even!