Read Matthew 16:13-20
13 Jesus went to the territory near the town of Caesarea Philippi, where he asked his disciples, “Who do people say the Son of Man is?”
14 “Some say John the Baptist,” they answered. “Others say Elijah, while others say Jeremiah or some other prophet.”
“What about you?” he asked them. “Who do you say I am?” 16Simon Peter answered, “You are the Messiah, the Son of the living God.”
17 “Good for you, Simon son of John!” answered Jesus. “For this truth did not come to you from any human being, but it was given to you directly by my Father in heaven. 18And so I tell you, Peter: you are a rock, and on this rock foundation I will build my church, and not even death will ever be able to overcome it. 19I will give you the keys of the Kingdom of heaven; what you prohibit on earth will be prohibited in heaven, and what you permit on earth will be permitted in heaven.”
20 Then Jesus ordered his disciples not to tell anyone that he was the Messiah.
Peter recognises Jesus as the anointed King of Israel and Jesus gives him authority - as an ambassador of the Kingdom of heaven on Earth; such a great honour! In the next passage Peter will try to keep Jesus from following the way of the cross - and Jesus will rebuke him. Leadership in Jesus name has to go the way of the cross.