Matthew 16: Who is Jesus to Peter?

 The Jews were under Roman control. They were expecting the Messiah for a long time. The Messiah would make the will of the Lord - He would destroy the enemies of Israel.
We read:

13 When Jesus arrived in the villages of Caesarea Philippi, he asked his disciples, “What are people saying about who the Son of Man is?”

16 Simon Peter said, “You’re the Christ, the Messiah, the Son of the living God.”

Peter had already seen many miracles and sermons of Jesus. Jesus said that the Spirit revealed that to Peter.

21-22 Then Jesus made it clear to his disciples that it was now necessary for him to go to Jerusalem, submit to an ordeal of suffering at the hands of the religious leaders, be killed, and then on the third day be raised up alive. Peter took him in hand, protesting, “Impossible, Master! That can never be!”

Peter was chocked. He left everything to follow Jesus. He bet on Jesus. Now, Jesus is saying that he will be killed. Peter must stopped listening to Jesus at this moment.

23 But Jesus didn’t swerve. “Peter, get out of my way. Satan, get lost. You have no idea how God works.”

Perhaps Jesus was looking to Peter when he said:

24-26 Then Jesus went to work on his disciples. “Anyone who intends to come with me has to let me lead. You’re not in the driver’s seat; I am. Don’t run from suffering; embrace it. Follow me and I’ll show you how. Self-help is no help at all. Self-sacrifice is the way, my way, to finding yourself, your true self. What kind of deal is it to get everything you want but lose yourself? What could you ever trade your soul for?

Peter became a leader in the beginning of the church, but the tradition says he was crucified by a roman persecution to Christians. Jesus called me to a life of suffering, self-sacrifice that involves to bless my enemies, to pray for them. Jesus became the center of the Peter's life.