“Sea of Air,” as many Portugal. The Man songs, talks about atheism. According to John Baldwin,

There was nothing up there no, no nothing at all
Nothing but space nothing but ground

He also afirms that will be brave in the final of his life if God really exists. For him, the universe is just a “sea of air.” It’s the turning point for the narrator, he stops questioning the existence of any higher being and decides he will live his life how he wants and not worry how society views himself.