137 Neither should we stumble at the circumstance that the same Matthew has stated that the chief priests and the elders of the people came to the Lord, and asked Him by what authority He did these things, and who gave Him this authority, on the occasion when He too, in turn, interrogated them concerning the baptism of John, inquiring whence it was, whether from heaven or of men; to whom also, on their replying that they did not know, He said, “Neither do I tell you by what authority I do those things.”
For he has followed up this with the words introduced in the immediate context, “But what think ye? A certain man had two sons,” and so forth. Thus this discourse is brought into a connection which is continued, uninterrupted by the interposition either of any thing or of any person, down to what is related regarding the vineyard which was let out to the husbandmen. It may, indeed, be supposed that He spoke all these words to the chief priests and the elders of the people, by whom He had been interrogated with regard to His authority.
But then, if these persons had indeed questioned Him with a view to tempt Him, and with a hostile intention, they could not be taken for men who had believed, and who cited the remarkable testimony in favour of the Lord which was taken from a prophet; and surely it is only if they had the character of those who believed, and not of those who were ignorant, that they could have given a reply like this: “He will miserably destroy those wicked men, and will let out his vineyard to other husbandmen.”
This peculiarity [of Matthew's account], however, should not by any means so perplex us as to lead us to imagine that there were none who believed among the multitudes who listened at this time to the Lord's parables. For it is only for the sake of brevity that the same Matthew has passed over in silence what Luke does not fail to mention—namely, the fact that the said parable was not spoken only to the parties who had interrogated Him on the subject of His authority, but to the people.
For the latter evangelist puts it thus: “Then began He to speak to the people this parable; A certain man planted a vineyard,” and so on. Accordingly, we may well understand that among the people then assembled there might also have been persons who could listen to Him as those did who before this had said, “Blessed is He that comes in the name of the Lord;” and that either these, or some of them, were the individuals who replied in the words, “He will miserably destroy these wicked men, and will let out his vineyard to other husbandmen.”
The answer actually returned by these men, moreover, has been attributed to the Lord Himself by Mark and Luke, not only because their words were really His words, inasmuch as He is the Truth that ofttimes speaks even by the wicked and the ignorant, moving the mind of man by a certain hidden instinct, not in the merit of man's holiness, but by the right of His own proper power; but also because the men may have been of a character admitting of their being reckoned, not without reason, as already members in the true body of Christ, so that what was said by them might quite warrantably be ascribed to Him whose members they were.
For by this time He had baptized more than John, and had multitudes of disciples, as the same evangelists repeatedly testify; and from among these followers He also drew those five hundred brethren, to whom the Apostle Paul tells us that He showed Himself after His resurrection. And this explanation of the matter is supported by the fact that the phrase which occurs in the version by this same Matthew,— namely, “They say unto Him, He will miserably destroy those wicked men,”— is not put in a form necessitating us to take the pronoun illi in the plural number, as if it was intended to mark out the words expressly as the reply made by the persons who had craftily questioned Him on the subject of His authority; but the clause, “They say unto Him,” is so expressed that the term illi should be taken for the singular pronoun, and not the plural, and should be held to signify “unto Him,” that is to say, unto the Lord Himself, as is made clear in the Greek codices, without a single atom of ambiguity.
Source: The Harmony of the Gospels (New Advent)