Matthew 16:13-19
16.When Jesus came into the coast of Caes-a-re-a a Phi-lip-pi, he asked his disciples, saying, whom do men say that I the Son of man am?
14. And they said, Some say that thou art John the Baptist: some Elias; and others, Jeremias, or one of the prophets.
15. He saith unto them, But whom say ye that I am?
16. And Simon Peter answered and said, Thou art the Christ, the Son of the living God.
17. And Jesus answered and said unto him, Blessed art thou, Simon Bar-jo-na: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.
18. And I say unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.
19. And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.

Jesus questioned the disciples to see what others were saying. Who others believed that He may be. Then Jesus asked them who they thought He was. Peter makes a great witness, he has been told by God in Heaven and believes with all his heart and knows that Jesus is God's only Son. As Christians we need to be witnessing to others about who Jesus is and what He has done to save us all. Just as Peter did later on we will fall and stumble along the way, but we must ask God to forgive us and lead us to where is work needs done. Peter done great work for God, many times he was beaten and thrown in prison but he kept up the work that God gave him to do..