John 21:18-22

Verse 18

Thou shalt stretch forth thy hands - Wetstein observes that it was a custom at Rome to put the necks of those who were to be crucified into a yoke, and to stretch out their hands and fasten them to the end of it; and having thus led them through the city they were carried out to be crucified. See his note on this place. Thus then Peter was girded, chained, and carried whither he would not - not that he was unwilling to die for Christ; but he was a man - he did not love death; but he loved his life less than he loved his God.
Verse 19

Should glorify God - Ancient writers state that, about thirty-four years after this, Peter was crucified; and that he deemed it so glorious a thing to die for Christ that he begged to be crucified with his head downwards, not considering himself worthy to die in the same posture in which his Lord did. So Eusebius, Prudentius, Chrysostom, and Augustin. See Calmet.

Follow me - Whether our Lord meant by these words that Peter was to walk with him a little way for a private interview, or whether he meant that he was to imitate his example, or be conformed to him in the manner of his death, is very uncertain.
Verse 22

If I will that he tarry till I come - There are several opinions concerning this: the following are the principal.

1. Some have concluded from these words that John should never die. Many eminent men, ancients and moderns, have been and are of this opinion.

2. Others thought that our Lord intimated that John should live till Christ came to judge and destroy Jerusalem. On this opinion it is observed that Peter, who was the oldest of the apostles, died in the year 67, which, says Calmet, was six years before the destruction of Jerusalem; and that John survived the ruin of that city about thirty years, he being the only one of the twelve who was alive when the above desolation took place.

3. St. Augustin, Bede, and others, understood the passage thus: If I will that he remain till I come and take him away by a natural death, what is that to thee? follow thou me to thy crucifixion. On this it may be observed, that all antiquity agrees that John, if he did die, was the only disciple who was taken away by a natural death.

4. Others imagine that our Lord was only now taking Peter aside to speak something to him in private, and that Peter, seeing John following, wished to know whether he should come along with them; and that our Lord's answer stated that John should remain in that place till Christ and Peter returned to him; and to this meaning of the passage many eminent critics incline. For neatly eighteen hundred years, the greatest men in the world have been puzzled with this passage. It mould appear intolerable in me to attempt to decide, where so many eminent doctors have disagreed, and do still disagree. I rather lean to the fourth opinion. See the conclusion of the Preface to this Gospel.
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