Then began he to speak to the people this parable;
A certain man planted a vineyard, and let it out to tenants, and went into a far country for a long time.
All Commentaries on Luke 20:9 Go To Luke 20
Cyril of Alexandria
AD 444
Or God took Himself away from the vineyard for the course of many years, for since the time that He was seen to descend in the likeness of fire upon Mount Sinai, He no longer vouchsafed to them His visible presence; though no change took place, in which He sent not His prophets and righteous men to give warning thereof; as it follows, And at the time of the vintage he sent a servant to the husbandmen, that they should give him of the fruit of the vineyard.
The Lord of the vineyard also ponders what He should do, not that He is in need of ministers, but that having thoroughly tried every device of human aid, yet His people being in no wise healed, He may add something greater; as He goes on to say, I will send my beloved son: it may be they will reverence him when they see him.
The Jewish rulers were shut out then, because they resisted their Lord's will, and made the vineyard barren which was entrusted to them. But the cultivation of the vineyard was given to the Priests of the New Testament, upon which the Scribes and Pharisees, as soonas they perceived the force of the parable, refuse to permit it, saying as follows, God forbid. They did not however escape any whit the more, because of their obstinacy and disobedience to the faith of Christ.