The door that seems so impenetrable is the eternal communion of love between the Father and the Son. The story of the Bible is that God the Father sent his only true and eternal Son on a mission, and that was to bring many wayward and rebellious sons home to glory (Hebrew 2:10). That is the Story behind the story of the Prodigal Sons. That is the only story that gives our stories any meaning or significance.
Cruver, Dan. Reclaiming Adoption. Eds. Dan Cruver. Cruciform Press, 2011. 11.