“There were two brothers. Having divided the paternal inheritance between themselves, one remained at home, the other squandered all that was given to him and departed to a distant land because he could not bear the shame of poverty.
I wanted to speak of this parable from the outset so that you could learn that, if we are attentive, there is remission of sins even after baptism. I do not say this to put you in a state of inertia, but to distance you from discouragement, because discouragement produces worse evils among us than inertia. Therefore, this son bears the image of those who suffer the fall after the Laver. That he represents those who fell after baptism is obvious from the parable. He is called “son”; no one can be called a son without baptism. Furthermore, he inhabited the paternal house, and took his share from all the paternal substance. Before baptism no one has the right to receive paternal things, nor to obtain an inheritance, so that through all these events he speaks to us about the status of the faithful. He was a brother of the reputable one; he would not have become a brother without spiritual regeneration. Therefore, what does the one say who fell into the workst wickedness? “I will arise and return to my father.” His father did not hinder him from departing to the foreign land precisely for this reason: so that he could learn well from the experience how much beneficence he enjoyed while remaining at home.
Therefore, since the prodigal son departed for the foreign land and learned from his own experience how much evil it is for someone to be driven out of his paternal house, he returned, and his father did not remember the wrongs that he had committed against him, but accepted him with open arms. Why? Because he was a father and not a judge. Then, there took place dances, sumptuous feasts, and festivals; and the entire house was beaming with joy and exceeding gladness. What are you saying? These are rewards of wickedness? Not of wickedness, O man, but of the return. Not of sin, but of repentance. Not of cunningness, but of change toward the better.”
(St. John Chrysostom, The Fathers of the Church, pp. 11-13)