Johannes 21:17

He saith unto him the third time, Simon, son of Jonas, lovest thou me? Peter was grieved because he said the third time, &c.--This was the Physician's deepest incision into the wound, while yet smarting under the two former probings. Not till now would Peter discern the object of this succession of thrusts. The third time reveals it all, bringing up such a rush of dreadful recollections before his view, of his "thrice denying that he knew Him," that he feels it to the quick. It was fitting that he should; it was meant that he should. But this accomplished, the painful dialogue concludes with a delightful "Feed My sheep"; as if He should say, "Now, Simon, the last speck of the cloud which overhung thee since that night of nights is dispelled: Henceforth thou art to Me and to My work as if no such scene had ever happened."

The evangelist seemed to have concluded his history with the foregoing chapter; but (as St. Paul sometimes in his epistles), new matter occurring, he begins again. He had said that there were many other signs which Jesus did for the proof of his resurrection. And in this chapter he mentions one of these many, which was Christ's appearance to some of his disciples at the sea of Tiberias, in which we have an account, I. How he discovered himself to them as they were fishing, filled their net, and then very familiarly came and dined with them upon what they had caught (Joh 21:1-14). II. What discourse he had with Peter after dinner, 1. Concerning himself (Joh 21:15-19). 2. Concerning John (Joh 21:20-23). III. The solemn conclusion of this gospel (Joh 21:24, Joh 21:25). It is strange that any should suppose that this chapter was added by some other hand, when it is expressly said (Joh 21:24) that the disciple whom Jesus loved is he which testifieth of these things.

21:17 feed my sheep: Jesus, who knows all things (1:42; 2:25; 16:30), understood that despite Peter’s terrible failing, he still had faith and commitment to Jesus. These words called Peter to nurture and protect Christ’s followers.