Ambrose of Milan
Catena Aurea · Lukasevangelium 13
He spake also this parable; A certain man had a fig tree planted in his vineyard; and he came and sought fruit thereon, and found none. Then said he unto the dresser of his vineyard, Behold, these three years I come seeking fruit on this fig tree, and find none; cut it down: why cumbereth it the ground? And he answering said unto him, Lord, let it alone this year also, till I shall dig about it, and dung it: And if it bear fruit, well: and if not, then after that thou shalt cut it down.
But our Lord sought, not because He was ignorant that the fig tree had no fruit, but that He might shew in a figure that the synagogue ought by this time to have fruit. Lastly, from what follows, He teaches that He Himself came not before the time who came after three years. For so it is said, Then said he to the dresser of the vineyard, Behold, these three years I come seeking fruit on this fig tree, and find none. He came to Abraham, He came to Moses, He came to Mary, that is, He came in the seal of the covenant, He came in the law, He came in the body. We recognise His coming by His gifts; at one time purification, at another sanctification, at another justification. Circumcision purified, the law sanctified, grace justified. The Jewish people then could not be purified because they had not the circumcision of the heart, but of the body; nor be sanctified, because ignorant of the meaning of the law, they followed carnalthings rather than spiritual; nor justified, because not working repentance for their offences, they knew nothing of grace. Rightly then was there no fruit found in the synagogue, and consequently it is ordered to be cut down; for it follows, Cut it down, why cumbereth it the ground? But the merciful dresser, perhaps meaning him on whom the Church is founded, foreseeing that another would be sent to the Gentiles, but he himself to them who were of the circumcision, piously intercedes that it may not be cut off; trusting to his calling, that the Jewish people also might be saved through the Church. Hence it follows, And he answering said unto him, Lord, let it alone this year also. He soon perceived hardness of heart and pride to be the causes of the barrenness of the Jews. He knew therefore how to discipline, who knew how to censure faults. Therefore adds He, till I shall dig about it. He promises that the hardness of their hearts shall be dug about by the Apostles’ spades, lest a heap of earth cover up and obscure the root of wisdom. And He adds, and dung it, that is, by the grace of humility, by which even the fig is thought to become fruitful toward the Gospel of Christ. Hence He adds, And if it bear fruit, well, that is, it shall be well, but if not, then after that thou shall cut it down.