We do not know the reading patterns of the prodigal son or even if he was literate. Forgiveness was asked for and given. The celebration feast expressed a father's love. We sense the gratitude that must have arisen in the heart of the forgiven son. St. Paul knew these lessons well.
Reconciliation means asking for and receiving forgiveness.
As an ambassador of Christ, he proclaimed the mystery of God's love in Jesus. Autonomy is our highest virtue. The prodigal son sought autonomy and independence. His elder brother, in his own way, wanted to keep detached strings detached. St. Paul too had to gradually realize that we are all involved in a great web of exchange joined together in Christ.