John 21: Jesus restores Peter

Peter has denied Jesus for three times. 
Even though Peter had believed that Jesus is the Messiah, he thought that the Messiah wouldn't die. How could the Messiah that would reign over nations be humiliated by the Romans? Impossible! However, now Jesus is resurrected, alive. No doubt Jesus is the Messiah, the King. Peter is very glad to meet Jesus after resurrection but would he be forgiven?
Yes, indeed. Jesus came to Peter, offered him fish as breakfast. Is he in the sea of Galilee after resurrection? It seems so. Thus, the gospel of John agrees with the gospel of Matthew - the disciples went to Galilee after resurrection.
Jesus asks three times if Peter loves him:

17-19 Then he said it a third time: “Simon, son of John, do you love me?”
Peter was upset that he asked for the third time, “Do you love me?” so he answered, “Master, you know everything there is to know. You’ve got to know that I love you.”
Jesus said, “Feed my sheep. I’m telling you the very truth now: When you were young you dressed yourself and went wherever you wished, but when you get old you’ll have to stretch out your hands while someone else dresses you and takes you where you don’t want to go.” He said this to hint at the kind of death by which Peter would glorify God. And then he commanded, “Follow me.”

Peter was restored. He fed Jesus's sheep (he led the church). Peter was crucified too and glorified the Lord by his death. 
Jesus is the healer of our souls. Glory to him.