I think this song is about someone who is frustrated on not believing in himself that he could achieve something on a bigger scale if only he believe or think that he had it all or if someone would say you're not alone or your not so bad. He had wasted many years of his life because he's afraid to try to be rejected (he needs to belong) including his wife where he's afraid to loose her (thinking there's only you) even if she doesn't sympathize or have the same way of thinking as him. Bottom line is his faith... To restate it in other words... I wish I believe I had it all, All The Time. I don't know if I'm correct just my opinion. Thanks!