Now when Jesus came into the district of Caesarea Philippi, he asked his disciples, “Who do people say that the Son of Man is?” And they said, “Some say John the Baptist, others say Elijah, and others Jeremiah or one of the prophets.” He said to them, “But who do you say that I am?” Simon Peter replied, “You are the Christ, the Son of the living God.” And Jesus answered him, “Blessed are you, Simon Bar-Jonah! For flesh and blood has not revealed this to you, but my Father who is in heaven. 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. I will give you the keys of the kingdom of heaven, and whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.” Then he strictly charged the disciples to tell no one that he was the Christ. (Matthew 16:13–20, ESV)
Grace and peace to you from our Lord and Savior, Jesus Christ. Amen.
What is going to happen to the Church?
That question is never far away. Especially now. We are working on a new building. We are looking toward a pastoral vacancy. We look around and see empty places where faithful Christians once sat. Long-time members die. Families change. Communities change. Pastors come and go. What is going to happen to the Church? We ask it with concern. Sometimes with fear. And when fear takes hold, we begin looking for something we can control. The right pastor. The right program. The right building. More members. More money. More energy. A better plan. If we could only get everything lined up correctly, then the Church would be safe.
Who Do You Say That I Am?
But Jesus asks a different question. “Who do you say that I am?”
Jesus first asks His disciples what everyone else is saying. The answers are respectful. John the Baptist. Elijah. Jeremiah. One of the prophets. People know Jesus is important. They know He is unusual. They know that God is somehow at work through Him. But every answer falls short. Jesus is more than a teacher. More than an example. More than a prophet. More than someone who helps us make life work a little better.
So Jesus turns to His disciples. “But who do you say that I am?” Peter answers for them all: “You are the Christ, the Son of the living God.”
The confession doesn’t get any clearer than that. The man standing in front of Peter, breathing the same air, eating the same food, wearing out the same sandal leather, is the promised Christ. He is the Son of the living God. He is the One God promised to send. He is the One who has come to save sinners. Peter gets the words exactly right. But Peter doesn’t get the credit.
“Blessed are you, Simon Bar-Jonah! For flesh and blood has not revealed this to you, but My Father who is in heaven.” Peter did not solve the mystery. He did not put the clues together better than everyone else. He did not discover Christ by the strength of his faith. The Father revealed the Son.
That matters because our sinful hearts want credit. We want to believe that we are Christians because we were wise enough to recognize Jesus. We want to think that the Church continues because we are faithful enough, organized enough, generous enough, or determined enough to keep it alive. But flesh and blood cannot reveal the Christ. Flesh and blood cannot create faith. Flesh and blood cannot build the Church. And yet we try.
We begin to act as though everything depends on us. If the Church struggles, we blame ourselves or someone else. If attendance declines, we panic. If the future is unclear, we imagine the worst. If our plans do not work, we act as though Christ Himself has failed. We turn gifts into foundations. A pastor is a gift, but a pastor is not the foundation. A building is a gift, but a building is not the foundation. Programs, money, volunteers, music, and plans are gifts. Important gifts. But none of them can carry the weight of Christ’s Church.
And neither can you. You cannot save the Church. You cannot even save yourself. You and I are sinners. We have sinned in thought, word, and deed. We have trusted our plans more than Christ’s promise. We have treated our opinions as though they were God’s Word. We have withheld love from our neighbors. We have worried as though Christ were dead and His Church were ours to rescue. Flesh and blood cannot fix that. But there is One who can.
I Will Build My Church
Listen to the verbs Jesus uses. “My Father has revealed.” “I will build.” “I will give.” The Father reveals the Son. The Son builds His Church. The Son gives the keys.
Jesus does not say, “Peter, you will build My Church.” He does not say, “Pastor Watt will build My Church.” He does not say, “If Life in Christ finds the right next pastor, finishes the right building, gathers enough people, and works hard enough, then My Church will survive.” He says, “I will build My Church.” Jesus. The Christ. The Son of the living God.
And what does it mean that He is the Christ? Peter has the title right, but he does not yet understand what the title means. In the very next verses Jesus tells His disciples that He must go to Jerusalem. He must suffer. He must be killed. And on the third day He must rise. Peter hates that plan. He takes Jesus aside and rebukes Him. Peter wants a Christ without a cross. So do we.
We want a Christ who keeps suffering away. A Christ who makes our plans succeed. A Christ who guarantees growing attendance, balanced budgets, healthy bodies, happy families, and an easy future. But a Christ without the cross cannot save sinners. Jesus does not go to Jerusalem because His plans failed. The cross is the plan. He goes there deliberately. He bears the judgment your sin deserves. He carries your guilt in His own body. He suffers your death. He sheds His blood for you. And then He rises.
Death could not hold Him. Hell could not defeat Him. The stone was rolled away, and the crucified Christ walked out alive. That is why the gates of hell will not prevail against His Church. The Church belongs to the risen Jesus. Long-time members die, but they belong to the risen Jesus. Pastors come and go, but the risen Jesus remains. Buildings age. Communities change. Our plans succeed and fail. But Jesus Christ is risen from the dead. His salvation is forever.
Isaiah tells frightened people to look back to Abraham and Sarah. God began with one man and one barren woman. There was no visible future there. Nothing they could build on. Nothing except God’s promise. And God kept His promise. That is how God has always built His Church. By His Word. By His promise. By doing what flesh and blood cannot do.
Jesus Has the Keys
Then Jesus says, “I will give you the keys of the kingdom of heaven.” Keys open and close. They lock and unlock. And Jesus places His keys into His Church. Not as private power for Peter. Not as personal power for a pastor. They remain Christ’s keys. They work by Christ’s command. You have already heard those keys this morning. Your pastor stood before you and said, “I forgive you all your sins.” That was not my personal opinion about you. It was not a wish that God might possibly be merciful. It was Christ’s verdict spoken into your ears.
Christ opened heaven for you. He loosed you from your sins. The Christ who died for you and rose for you said, “I forgive you.” Hell has gates. But Jesus has the keys.
He gave you that same forgiveness when He joined you to His death and resurrection in Holy Baptism. He placed His name upon you and claimed you as His own. That promise has not expired. You return to it every day in repentance and faith: I am baptized. Christ’s death is for me. Christ’s resurrection is for me.
He feeds you at His altar with His true body and blood. The body given on the cross. The blood shed for forgiveness. The living Christ gives Himself to you, strengthening your faith and pledging the resurrection of your body on the Last Day.
This is how Christ builds His Church. Word and water. Bread and wine. Forgiveness spoken into human ears. Simple things that flesh and blood dismiss as weak. But Christ is doing the building.
Free to Serve Without Fear
And because Christ is doing the building, you are free to serve without fear. St. Paul says that we are one body with many members. God gives different gifts. No member has every gift. No pastor has every gift. No single person is indispensable. Christ is indispensable. So use what He has given you. Teach. Encourage. Give. Lead. Show mercy. Pray for the congregation. Welcome the stranger. Care for the grieving. Support the work. Speak the confession.
Not to save the Church. Jesus has already taken that burden. You serve because you belong to the Church He has saved.
Even Here, Even Now
What is going to happen to the Church?
There will be changes. There will be troubles. There will be things we cannot predict and things we cannot control. Jesus has not promised us an easy future. He has promised something better. “I will build My Church, and the gates of hell shall not prevail against it.”
Who do you say that He is? He is the Christ, the Son of the living God. The One who went to the cross for you. The One who rose from death for you. The One who forgives you. The One who holds the keys. The One who is building His Church—even here, even now.
Amen.
The peace of God, which surpasses all understanding, keep your hearts and your minds in Christ Jesus. Amen.