As Peter stumbles through the Gospels he seems to really love Jesus and even swears to Him that he would give his life for Jesus. But just as Jesus prophesied, he denied knowing Jesus 3 times during the time of the crucifixion before the rooster crowed.
But...remember...this is the man that Jesus gave the keys to the Kingdom of God. Jesus knew what kind of man Peter was...even if Peter didn't.
Just as Peter denied Jesus 3 times...Jesus asked Peter 3 times, "Simon son of John, do you love me?".
Of course this hurt Peter's feelings so he said, "Lord, you know all things; you know that I love you."
Then Jesus said, "Feed my sheep".
Then during the day of Pentecost when they had all gathered, this happened:
Suddenly a sound like the blowing of a violent wind came from heaven and filled the whole house where they were sitting. They saw what seemed to be tongues of fire that separated and came to rest on each of them. All of them were filled with the Holy Spirit and began to speak in other tongues.
OH WOW...Now it hit Peter...here's where the sheep feeding comes in to play!
The Holy Spirit change them all. Peter stood up and addressed the crowd. He would never have done that before. I won't spoil it for you here...you can read about it in the book of Acts.
Historical data says that at the end of his days, St. Peter died as a martyr for his faith in Jesus but he felt unworthy to die in the same manner as Jesus so he had them crucify him...UPSIDE DOWN.
Definitely a changed man...
Psalms 22:1 starts out with what seems like a quote from Jesus after He was crucified.
"My God, my God, why have you forsaken me?"
But how could that be? Psalms 22 was written by King David 1000 years before Jesus was even BORN. Hmmmm....Not to forget that crucifixion wasn't introduced to Rome until the 3rd century BC by the Phoenicians. So King David had never even HEARD of crucifixion when he wrote this psalm. It would be 700 years before crucifixion would even reach his region.
So hey, go on. You HAVE to go read it now