What is the meaning behind the anime title "The World God only Knows"? Keima is a Capturing God, we all know that. After finishing the manga, I'm still confused by the title.

Can anyone please enlighten me?
I think it means "the world only god knows". "God only knows" is an old way of language. So, I infer that since the setting (plot device) of this anime is about "capturing girls" , it is sort of a world that only Keima (god of capturing) knows.