V. St. Peter was the first to benefit by his Master's humiliation
And how much this humiliation conferred upon all the faithful, the most blessed Apostle Peter was the first to prove, who, after the fierce blast of threatening cruelty had dismayed him, quickly changed, and was restored to vigour, finding remedy from the great Pattern, so that the suddenly-shaken member returned to the firmness of the Head. For the bond-servant could not be “greater than the Lord, nor the disciple greater than the master,” and he could not have vanquished the trembling of human frailty had not the Vanquisher of Death first feared.
The Lord, therefore, “looked back upon Peter,” and amid the calumnies of priests, the falsehoods of witnesses, the injuries of those that scourged and spat upon Him, met His dismayed disciple with those eyes wherewith He had foreseen his dismay: and the gaze of the Truth entered into him, on whose heart correction must be wrought, as if the Lord's voice were making itself heard there, and saying, Where are you going, Peter? Why do you retire upon yourself? Turn to Me, put your trust in Me, follow Me: this is the time of My Passion, the hour of your suffering is not yet come. Why do you fear what you, too, shall overcome? Let not the weakness, in which I share, confound you. I was fearful for you; be confident of Me.
Source: Sermons (New Advent)