The Without You Songfacts reports that Urban reflects in this song on the importance of his relationship with his wife Nicole Kidman, having for a long time previously been consumed by his job. Despite its personal nature, the song was penned by two outside writers Dave Pahanish and Joe West.
I've loved you since the very first day
When I caught you looking my way
A smile and just knew it.
And up until you came along, no one ever heard my song,