Here I ask your indulgence as I take some nonscriptural liberty in my portrayal of this exchange. In effect, Peter said to his associates: “Brethren, it has been a glorious three years. None of us could have imagined such a few short months ago the miracles we have seen and the divinity we have enjoyed. We have talked with, prayed with, and labored with the very Son of God Himself. We have walked with Him and wept with Him, and on the night of that horrible ending, no one wept more bitterly than I. But that is over. He has finished His work, and He has risen from the tomb. He has worked out His salvation and ours. So you ask, ‘What do we do now?’ I don’t know more to tell you than to return to your former life, rejoicing. I intend to ‘go a fishing.’” And at least six of the ten other remaining Apostles said in agreement, “We also go with thee.” John, who was one of them, writes, “They went forth, and entered into a ship immediately.”
But, alas, the fishing wasn’t very good. Their first night back on the lake, they caught nothing—not a single fish. With the first rays of dawn, they disappointedly turned toward the shore, where they saw in the distance a figure who called out to them, “Children, have you caught anything?” Glumly these Apostles-turned-again-fishermen gave the answer no fisherman wants to give. “We have caught nothing,” they muttered, and to add insult to injury, they were being called “children.”
“Cast the net on the right side of the ship, and ye shall find,” the stranger calls out—and with those simple words, recognition begins to flood over them. Just three years earlier these very men had been fishing on this very sea. On that occasion too they had “toiled all the night, and [had] taken nothing,” the scripture says. But a fellow Galilean on the shore had called out to them to let down their nets, and they drew “a great multitude of fishes,” enough that their nets broke, the catch filling two boats so heavily they had begun to sink.
Now it was happening again. These “children,” as they were rightly called, eagerly lowered their net, and “they were not able to draw it for the multitude of fishes.” John said the obvious: “It is the Lord.” And over the edge of the boat, the irrepressible Peter leaped.
After a joyful reunion with the resurrected Jesus, Peter had an exchange with the Savior that I consider the crucial turning point of the apostolic ministry generally and certainly for Peter personally, moving this great rock of a man to a majestic life of devoted service and leadership. Looking at their battered little boats, their frayed nets, and a stunning pile of 153 fish, Jesus said to His senior Apostle, “Peter, do you love me more than you love all this?” Peter said, “Yea, Lord; thou knowest that I love thee.”
The Savior responds to that reply but continues to look into the eyes of His disciple and says again, “Peter, do you love me?” Undoubtedly confused a bit by the repetition of the question, the great fisherman answers a second time, “Yea, Lord; thou knowest that I love thee.”
The Savior again gives a brief response, but with relentless scrutiny He asks for the third time, “Peter, do you love me?” By now surely Peter is feeling truly uncomfortable. Perhaps there is in his heart the memory of only a few days earlier when he had been asked another question three times and he had answered equally emphatically—but in the negative. Or perhaps he began to wonder if he misunderstood the Master Teacher’s question. Or perhaps he was searching his heart, seeking honest confirmation of the answer he had given so readily, almost automatically. Whatever his feelings, Peter said for the third time, “Lord, … thou knowest that I love thee.”
To which Jesus responded (and here again I acknowledge my nonscriptural elaboration), perhaps saying something like: “Then Peter, why are you here? Why are we back on this same shore, by these same nets, having this same conversation? Wasn’t it obvious then and isn’t it obvious now that if I want fish, I can get fish? What I need, Peter, are disciples—and I need them forever. I need someone to feed my sheep and save my lambs. I need someone to preach my gospel and defend my faith. I need someone who loves me, truly, truly loves me, and loves what our Father in Heaven has commissioned me to do. Ours is not a feeble message. It is not a fleeting task. It is not hapless; it is not hopeless; it is not to be consigned to the ash heap of history. It is the work of Almighty God, and it is to change the world. So, Peter, for the second and presumably the last time, I am asking you to leave all this and to go teach and testify, labor and serve loyally until the day in which they will do to you exactly what they did to me.”
"The First Great Commandment" Elder Jeffrey R. Holland October General Conference 2012 (emphasis added)