Just a short thought....
I preached a stand alone sermon on John 21 and called it the Peter's Restoration this Sunday. I am taking passages that would come after the end of the gospel of Matthew through the ascension of Jesus to Pentecost. We are looking at them to give encouragement and instruction to flex our spiritual muscles to share the gospel with those that God has put around us already. This Sunday was a type to look at the character of Peter and compare that to many who are like him. They tried God; were touched by God; spoke for God; but now are back doing what they were doing before. Peter went back fishing and took some of his buddies along. We have friends and family that fall into that model. Jesus comes to Peter and challenges him on his love for Him and also gives him instruction on what He wants him to do. Peter gets a personal prophecy from Jesus about his life and his death. Peter would grow old. Peter would be used by God to tend and shepherd the little lambs and sheep.