Ambrose of Milan
Catena Aurea · Lukasevangelium 15
And he said, A certain man had two sons: And the younger of them said to his father, Father, give me the portion of goods that falleth to me. And he divided unto them his living. And not many days after the younger son gathered all together, and took his journey into a far country, and there wasted his substance with riotous living. And when he had spent all, there arose a mighty famine in that land; and he began to be in want. And he went and joined himself to a citizen of that country; and he sent him into his fields to feed swine. And he would fain have filled his belly with the husks that the swine did eat: and no man gave unto him.
St. Luke has given three parables successively; the sheep which was lost and found, the piece of silver which was lost and found, the son who was dead and came to life again, in order that invited by a threefold remedy, we might heal our wounds. Christ as the Shepherd bears thee on His own body, the Church as the woman seeks for thee, God as the Father receives thee, the first, pity, the second, intercession, the third, reconciliation.