Matthew 21:38

But when He says, They will reverence my Son, He does not speak as in ignorance. For what is there that this householder (by whom in this place God is intended) knows not? But God is thus spoken of as being uncertain, in order that free-will may be reserved for man. Let us enquire of Arrius and Eunomius. See here the Father is said not to know somewhat. Whatever answer they make for the Father, let them understand the same of the Son, when He says that He knows not the day of the consummation of all things. (Mat. 22:36.)

(Verse 37, 38.) But lastly, he sent his son to them, saying: They will respect my son. However, the farmers, upon seeing the son, said among themselves: This is the heir; come, let us kill him, and we shall have his inheritance. In the passage above, we read: Again, he sent other servants more than the previous ones, and they did the same to them. The patience of the householder is shown in that he sent them more frequently, in order to provoke the wicked tenants to repentance. But they treasured up wrath for themselves on the day of wrath (Rom. 2). Moreover, that which is joined: They fear for my son, he does not come from ignorance. For what does the head of the household not know, who in this place is understood as God the Father? But God is always said to be ambiguous, so that free will may be preserved for man. Let us ask Arius and Eunomius. Behold, the Father is said to be ignorant, and he tempers his judgement, and as far as you are concerned, he is proven to be lying. Whatever they may answer on behalf of the Father, let them understand it as being on behalf of the Son, who himself says that he does not know the day of consummation.

After His entry into the Temple, and having cast out those who sold the animals for the sacrifices, then they took counsel to kill Him, Come, let us kill him. For they reasoned among themselves, It will happen that the people hereby shall disuse the practice of sacrificing, which pertains to our gain, and shall be content to offer the sacrifice of righteousness, which pertains to the glory of God; and so the nation shall no more be our possession, but shall become God's. But if we shall kill Him, then there being none to seek the fruit of righteousness from the people, the practice of offering sacrifice shall continue, and so this people shall become our possession; as it follows, And the inheritance shall be ours. These are the usual thoughts of all worldly Priests, who take no thought how the people shall live without sin, but look to how much is offered in the Church, and esteem that the profit of their ministry.

What then do these? When they ought to have run unto Him, when they ought to have asked pardon for their offenses, they even persist more strongly in their former sins, they proceed to add unto their pollutions, forever throwing into the shade their former offenses by their later; as also He Himself declared when He said, "Fill ye up the measure of your fathers." For from the first the prophets used to charge them with these things, saying, "Your hands are full of blood;" and, "They mingle blood with blood;" and, "They build up Sion with blood." But they did not learn self-restraint, albeit they received this commandment first, "Thou shalt not kill;" and had been commanded to abstain from countless other things because of this, and by many and various means urged to the keeping of this commandment. Yet, for all that, they put not away that evil custom; but what say they, when they saw Him? Come, let us kill Him. With what motive, and for what reason? what of any kind had they to lay to His charge, either small or great? Is it that He honored you, and being God became man for your sakes, and wrought His countless miracles? or that He pardoned your sins? or that He called you unto a kingdom? But see together with their impiety great was their folly, and the reason of His murder was full of much madness. "For let us kill Him," it is said, "and the inheritance shall be ours." And where do they take counsel to kill Him? "Out of the vineyard." Seest thou how He prophesies even the place where He was to be slain. "And they cast Him out, and slew Him."

Morally; a vineyard has been let out to each of us to dress, when the mystery of baptism was given us, to be cultivated by action. Servants one, two, and three are sent us when Law, Psalm, and Prophecy are read, after whose instructions we are to work well. He that is sent is beaten and cast out when the word is contemned, or, which is worse, is blasphemed. He kills (as far as in him lies) the heir, who tramples under foot the Son, and does despite to the Spirit of grace. The wicked husbandman is destroyed, and the vineyard is given to another, when the gift of grace which the proud has contemned is given to the lowly.