Verily, verily, I say unto you, When you were young, you dressed yourself, and walked where you would: but when you shall be old, you shall stretch forth your hands, and another shall dress you, and carry you where you would not.
All Commentaries on John 21:18 Go To John 21
Cornelius a Lapide
AD 1637
Verily, verily, I say unto thee, when thou wast young, &c, whither thou wouldst not, i.e, by thy natural will of sense, or feeling. For by the rational will Peter desired this above all things. S. Chrysostom says, Christ predicts his martyrdom, showing him in what way and how much he ought to love Christ and His sheep, even unto His cross.
When thou wast young: by this is shown, says S. Chrysostom, that Peter was neither a young, nor an old, but a perfect man. For such a one it behoved the Pontiff and prince of the Apostles to be, that his age might win him authority, and yet be apt and strong for apostolic labours.
The meaning Isaiah , When thou wast young, and hadst bodily strength, thou wast free, and didst rise from thy couch, and clothedst thyself, and walkedst at thine own pleasure whither thou wouldest; but when thou shalt be old, at the time when men seek rest and ease, thou shalt by no means rest, but shalt have harder labours. For they shall bind thee, and bring thee to the cross, where thou shalt stretch forth thy hands, i.e, shalt be crucified.
Less correctly, therefore, Lyra explains shall gird thee to mean, "Another shall bind thee with cords, not nail thee, to the cross. For the words, shall gird, refer not to the cross, but, as the Arabic and Syriac translate, to the loins of Peter, and to his hands and feet. Another, i.e. a lictor or a hangman, shall bind thy loins and thine arms, and carry thee as a criminal to the cross. Besides, S. Peter was not fastened to the cross with cords but with nails, as S. Chrysostom says expressly (Hom. in Princ. Apost.), "Rejoice, 0 Peter, who hast enjoyed the wood of the cross, and who wouldst not be crucified upright after the example of thy Master, but with thy head downwards, as it were ready for thy journey from earth to heaven0 blessed nails, which passed through those most holy limbs."
Admirably says S. Augustine, "That denier and lover, puffed up by presumption, cast down by denial, purified by tears, approved by confession, crowned by enduring, found such an end, that he died for perfect love of Christ"s name, with Whom in his perverse precipitance he had promised to die. Made strong by His resurrection, he does what in his weakness he had rashly promised. And now he fears not the destruction of this life, because the Lord having arisen, had shown him the pattern of another life."
