This prodigal son repented, went home, desiring to be a servant because he knew he didn't deserve sonship. His father forgave him, and he was given back what he had lost because of his repentance.
What most people forget is that the story does not end with the prodigal's return; it continues with the other son, who was angry that the father forgave the prodigal and refused to honor the father by attending the celebration of the other son's repentance.
One son left in anger, came back repentant, and the other son remained dutiful but bitter, never repenting.
So why do we say the "story of the prodigal"? There were two prodigal sons, but only one repented and was restored.
We often see those who do all the right things are proud of how good they were and are never repentant because they refuse to recognize their own stubborn attitude. They do their duty out of obligation but have no love or kindness for the father.
I think this is an excellent picture of families who have the "good son" and the "bad son." The bad son repents, and his life is changed, but the good son never repents and remains in bitterness and pride.
I believe the reason we were taught only one prodigal is because those who interpreted the scriptures were focused on deeds to be accepted by the father instead of focusing on the heart condision.
This may have led to the misunderstanding that we are accepted by the Father in heaven if we do well, but not accepted if we do not do well, even if we repent.
It is only Christ Who is acceptable, no one is acceptable because of their good behavior, or at least they think is good behavior. Those who have bad attitudes, are jealous and vindictive, think they are alright because their deeds are calculated to appear good, but their heart are wicked, just as wicked as if they had done hateful things.
Proverbs 23:7 "7 For as he thinks within himself, so he is.
He says to you, “Eat and drink!” But his heart is not with you."
God looks more upon the heart than the deeds because the deeds are an indicator outwardly, but the heart can hide the bitterness and anger while playing the role of a good person.