Luke 22:54

The wretched men understood not the mystery, nor had reverence unto an outpouring of compassion so merciful, that even His enemies He suffered not to be wounded. For it is said, Then look they him, &c. When we read of Jesus being holden, let us guard against thinking that He is holden with respect to His divine nature, and unwilling through weakness, for He is held captive and bound according to the truth of His bodily nature. Rightly he followed afar off, soon about to deny, for he could never have denied if he had clung close to Christ. But herein must he be revered, that he forsook not our Lord, even though he was afraid. Fear is the effect of nature, solicitude of tender affection.

(Hom. 83. in Matt.) It is therefore said, to the house of the High Priest, that nothing whatever might be done without the consent of the chief of the Priests. For thither had they all assembled waiting for Christ. Now the great zeal of Peter is manifested in his not flying when he saw all the others doing so; for it follows, But Peter followed afar off.

But first He was led to Annas, the father-in-law of Caiaphas, as John says, then to Caiaphas, as Matthew says, but Mark and Luke do not give the name of the High Priest.

Now the Chief Priest means Caiaphas, who according to John was High Priest that year.

But that when our Lord was going to His Passion, Peter followed afar off represents the Church about to follow indeed, that is, to imitate our Lord's Passion, but in a far different manner, for the Church suffers for herself, our Lord suffered for the Church.