We cannot tell - This was a direct falsehood. They could have told; and the answer should have been, "We will not tell." There was no reason but that why they did not tell. The reason, probably, why they would not acknowledge that John was a prophet, was that, if they did, they saw he could easily show them by "what authority" he did those things; that is, by his authority as Messiah. John came as his forerunner, pointed him out to the people, baptized him, and bore his public and solemn testimony to the fact that he was the Messiah, Matthew 3:13-15; John 1:29-34. If they acknowledged one, they must the other. In this way our Saviour was about to lead these crafty men to answer their own question, to their own confusion, about his authority. They saw this; and, having given them a "sufficient" answer, there was no need of stating anything further.

We cannot tell - Simplicity gives a wonderful confidence and peace of mind; but double dealing causes a thousand inquietudes and troubles. Let a man do his utmost to conceal in his own heart the evidence he has of truth and innocence, to countenance his not yielding to it; God, who sees the heart, will, in the light of the last day, produce it as a witness against him, and make it his judge.

We cannot tell, said they; which, in the words of truth, should have been, We will not tell, for we will not have this man for the Messiah: because, if we acknowledge John as his forerunner, we must, of necessity, receive Jesus as the Christ.

They who are engaged against the truth are abandoned to the spirit of falsity, and scruple not at a lie. Pharisaical pride, according to its different interests, either pretends to know every thing, or affects to know nothing. Among such, we may meet with numerous instances of arrogance and affected humility. God often hides from the wise and prudent what he reveals unto babes; for, when they use their wisdom only to invent the most plausible excuses for rejecting the truth when it comes to them, it is but just that they should be punished with that ignorance to which, in their own defense, they are obliged to have recourse.

And they answered Jesus and said, we cannot tell,.... They saw the dilemma they were brought into; they chose rather therefore to speak against their own consciences, and tell a wilful lie, and incur the reproach of ignorance: who, at other times, took upon them to judge of a prophet, whether he was a true or a false one, and by what authority he acted, whether of God, or man: but now being reduced to this wretched condition, contrary to their office and character, declare they did not know, and could not tell from whence John had his commission, and who gave him his authority:

and he said unto them, neither tell I you by what authority I do these things: since, according to the proposal of Christ, and the agreement he entered into with them, they did not give him a direct answer to his question, he looked upon himself under no obligation to inform them, what was his authority, and from whence he had it; though by the question he put to them he tacitly suggests, that he had his authority not from man, but from God; and by this his answer signifies, that since John preached and baptized without their authority and approbation, so might he; nor was he dependent on them, or accountable to them.

And they answered Jesus, and said, We cannot tell. And he said unto them, Neither tell I you by what authority I do these things.

21:27 We cannot tell. Hence the Lord refuses to answer their question, but immediately addresses them in a parable. As his death approaches, his parables are unusually solemn.

21:27 Neither tell I you - Not again, in express terms: he had often told them before, and they would not believe him.

27. And they answered Jesus, and said, We cannot tell-Evidently their difficulty was, how to answer, so as neither to shake their determination to reject the claims of Christ nor damage their reputation with the people. For the truth itself they cared nothing whatever.

Neither tell I you by what authority I do these things-What composure and dignity of wisdom does our Lord here display, as He turns their question upon themselves, and, while revealing His knowledge of their hypocrisy, closes their mouths! Taking advantage of the surprise, silence, and awe produced by this reply, our Lord followed it up immediately by the two following parables.

Parable of the Two Sons (Mt 21:28-32).

21:23-27 As our Lord now openly appeared as the Messiah, the chief priests and scribes were much offended, especially because he exposed and removed the abuses they encouraged. Our Lord asked what they thought of John's ministry and baptism. Many are more afraid of the shame of lying than of the sin, and therefore scruple not to speak what they know to be false, as to their own thoughts, affections, and intentions, or their remembering and forgetting. Our Lord refused to answer their inquiry. It is best to shun needless disputes with wicked opposers.