21:15-19 Our Lord addressed Peter by his original name, as if he had forfeited that of Peter through his denying him. He now answered, Thou knowest that I love thee; but without professing to love Jesus more than others. We must not be surprised to have our sincerity called into question, when we ourselves have done that which makes it doubtful. Every remembrance of past sins, even pardoned sins, renews the sorrow of a true penitent. Conscious of integrity, Peter solemnly appealed to Christ, as knowing all things, even the secrets of his heart. It is well when our falls and mistakes make us more humble and watchful. The sincerity of our love to God must be brought to the test; and it behoves us to inquire with earnest, preserving prayer to the heart-searching God, to examine and prove us, whether we are able to stand this test. No one can be qualified to feed the sheep and lambs of Christ, who does not love the good Shepherd more than any earthly advantage or object. It is the great concern of every good man, whatever death he dies, to glorify God in it; for what is our chief end but this, to die to the Lord, at the word of the Lord?

16. He saith to him … the second time … lovest thou me, &c.—In this repetition of the question, though the wound was meant to be reopened, the words "more than these" are not repeated; for Christ is a tender as well as skilful Physician, and Peter's silence on that point was confession enough of his sin and folly. On Peter's repeating his protestation in the same words, our Lord rises higher in the manifestation of His restoring grace.

Feed—keep.

my sheep—It has been observed that the word here is studiously changed, from one signifying simply to feed, to one signifying to tend as a shepherd, denoting the abiding exercise of that vocation, and in its highest functions.