From the hero's knowledge, he was a being from the highest dimension. There were lower dimensions and the living being there couldn't hope to match the living being in higher dimensions.
But Souta's explanation changed his view...
Actually, the moment he arrived here he already realized it. This planet has its own laws and concepts that felt like it was alive. It was different from outer space which was made weaker but at the same time, it felt like the two were connected.
