1. When our will is out of alignment with our heart we overestimate our commitment.
John 13:36 Simon Peter said to him, "Lord, where are you going?" Jesus answered him, "Where I am going you cannot follow me now, but you will follow afterward."
John 13:37-38 Peter said to him, "Lord, why can I not follow you now? I will lay down my life for you." 38 Jesus answered, "Will you lay down your life for me? Truly, truly, I say to you, the rooster will not crow till you have denied me three times."
2. Our faith must be ready to withstand the challenges of being a follower of Jesus Christ.
John 18:15-18 Simon Peter followed Jesus, and so did another disciple. Since that disciple was known to the high priest, he entered with Jesus into the court of the high priest, 16 but Peter stood outside at the door. So the other disciple, who was known to the high priest, went out and spoke to the servant girl who kept watch at the door, and brought Peter in. 17 The servant girl at the door said to Peter, "You also are not one of this man's disciples, are you?" He said, "I am not." 18 Now the servants and officers had made a charcoal fire, because it was cold, and they were standing and warming themselves. Peter also was with them, standing and warming himself.
3. We must decide what our responses will be before the trials come.
John 18:25 Now Simon Peter was standing and warming himself. So they said to him, "You also are not one of his disciples, are you?" He denied it and said, "I am not." 26 One of the servants of the high priest, a relative of the man whose ear Peter had cut off, asked, "Did I not see you in the garden with him?" 27 Peter again denied it, and at once a rooster crowed.
4. Failure is not final.
Luke 22:61-62 And the Lord turned and looked at Peter. And Peter remembered the saying of the Lord, how he had said to him, "Before the rooster crows today, you will deny me three times." 62 And he went out and wept bitterly.
5. Jesus elevates the humble and restores the repentant.
John 21:15 When they had finished breakfast, Jesus said to Simon Peter, "Simon, son of John, do you love me more than these?" He said to him, "Yes, Lord; you know that I love you." He said to him, "Feed my lambs."
Jesus asked Peter if he loved Him more than the other disciples. (Some say, more than the fish or fishing.) Feed my lambs indicates that Jesus' call upon Peter's life was to be a shepherd of people.
John 21:16 He said to him a second time, "Simon, son of John, do you love me?" He said to him, "Yes, Lord; you know that I love you." He said to him, "Tend my sheep."
John 21:17 He said to him the third time, "Simon, son of John, do you love me?" Peter was grieved because he said to him the third time, "Do you love me?" and he said to him, "Lord, you know everything; you know that I love you." Jesus said to him, "Feed my sheep.
When Jesus asked Peter if he loved Him, Jesus used a word for love which indicated total commitment. Peter did not respond with that same word. Peter knew his disobedience had not proven a love that was based upon total commitment. Peter's love for Jesus was great. However, Peter was reluctant because he knew he had failed Jesus.
Jesus was willing to forgive Peter and to give him the grace to overcome his failures. Jesus had planned for Peter to be the leader of the Apostles. Peter's unfailing love would be needed for such a dangerous task. Peter's faith and leadership had proven his place among the disciples. Jesus makes it clear that Peter's failure would not remove him from this place of leadership.
Matthew 16:18 And I tell you, you are Peter, and on this rock I will build my church, and the gates of hell shall not prevail against it.
6. Jesus has a plan for us. He will give us strength to fulfill our purpose.
John 21:18-19 Truly, truly, I say to you, when you were young, you used to dress yourself and walk wherever you wanted, but when you are old, you will stretch out your hands, and another will dress you and carry you where you do not want to go." 19 (This he said to show by what kind of death he was to glorify God.) And after saying this he said to him, "Follow me."
Church tradition suggests that Peter was crucified under the Emperor Nero by being crucified upside down (AD 67-68). Peter did not see himself worthy to die in the same posture as the Lord Jesus.