Matthew 26:33

I will never be. After our Saviour had assured them of the prediction of the prophet, that the flock should be dispersed, and had confirmed it himself, still Peter denied it; and the more Christ assured him of his weakness, the more, according to St. Luke, (chap. xxii.) did Peter affirm that he would not deny him. Whence this confidence in Peter? who when our Lord had said, that one of them would betray him, feared for himself, and though conscious of nothing, still prevailed on St. John to put the question to our Saviour. Freed now from that solicitude and anxiety, which has so much oppressed him concerning the treason of Judas, he began to trust to himself. Let us learn from this fall of the chief of the apostles, ever to assent with the greatest sincerity to the words of God. Let us believe him in every possible circumstance, though it may appear to our senses and understanding contradictory; for, the word of God can never be made void; but our senses may easily be deceived. When, therefore, he says, this is my body, let us without any the least hesitation immediately believe and contemplate the mystery with the eyes of our understanding. (St. John Chrysostom, hom. lxxxiii.)