Simon Peter answered, "You are the Messiah, the Son of the living God."
References for Matthew 16:16
And Jesus answered him, "Blessed are you, Simon son of Jonah! For flesh and blood has not revealed this to you, but my Father in heaven.
And I tell you, you are Peter, and on this rock I will build my church, and the gates of Hades will not prevail against it.
References for Matthew 16:18
I will give you the keys of the kingdom of heaven, and whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven."
Then he sternly ordered the disciples not to tell anyone that he was the Messiah.
References for Matthew 16:20
From that time on, Jesus began to show his disciples that he must go to Jerusalem and undergo great suffering at the hands of the elders and chief priests and scribes, and be killed, and on the third day be raised.
And Peter took him aside and began to rebuke him, saying, "God forbid it, Lord! This must never happen to you."
But he turned and said to Peter, "Get behind me, Satan! You are a stumbling block to me; for you are setting your mind not on divine things but on human things."
Then Jesus told his disciples, "If any want to become my followers, let them deny themselves and take up their cross and follow me.
For those who want to save their life will lose it, and those who lose their life for my sake will find it.
For what will it profit them if they gain the whole world but forfeit their life? Or what will they give in return for their life?