Theophylact of Ohrid

But Christ was silent, knowing that they would not heed His words, as Luke indeed observes that when they questioned the Lord, He said: "If I tell you, you will not believe; and if I also ask you, you will not answer Me" (Luke 22:67–68). The high priest again questions Jesus, not in order to learn the truth and believe, but to have some pretext for condemnation. …

Commentary on Mark ↗

Augustine of Hippo

It was not in vain that the prophecy regarding Him had preceded, "As the lamb before its shearer was dumb, so He opened not His mouth," especially on those occasions when He answered not His questioners. For although He frequently replied to questions addressed to Him, yet because of those in regard to which He declined making any reply, the metaphor of the lamb is supplied, in order that in His silence He might be accounted not as guilty, but innocent. …

Tractates On John 116.4 ↗

Hilary of Poitiers

If you will not learn Who Christ is from those that know Him, learn it at least from those that know Him not. So shall the confession, which their ignorance is forced to make, rebuke your blasphemy. The Jews did not recognise Christ, come in the body, though they knew that the true Christ must be the Son of God. And so, when they were employing false witnesses, without one word of truth in their testimony, against Him, their priest asked Him, Art Thou the Christ, the Son of the Blessed? …

On The Trinity 6.50 ↗

Bede

Again the high priest asked him, and said to him: Are you the Christ, the son of the Blessed? Jesus said to him: I am. In Matthew it is written that to the high priest asking and adjuring him if he was the Christ, he answered: You have said it (Matt. 26). For which Mark placed: I am, to show that what Jesus says to him: You have said it, is as much as if he had said: I am.

On the Gospel of Mark ↗