08/22/2026
“Who do you say that I am?”
The Gospel reading of Sunday, August 23, give us one of the most important conversations in the Gospel. Jesus brings His disciples to Caesarea Philippi and asks them a question that ultimately every Christian has to answer: “But who do you say that I am?” (Matthew 16:15).
The location matters.
Caesarea Philippi, whose ruins you can still visit today, was a strongly pagan place, built around a great cliff and grotto associated with the worship of Pan. The cave and its spring formed part of a pagan religious landscape associated with the underworld. It is precisely there, in the shadow of what people regarded as a gateway to the realm of death, that Jesus announces that He will build His Church and that “the gates of the netherworld shall not prevail against it” (Matthew 16:18).
Jesus is making a deliberate contrast. The disciples are standing before what their pagan surroundings presented as a gateway into the realm of death. Jesus declares that death itself will not have the final word.
And then Simon Peter makes his extraordinary confession:
“You are the Christ, the Son of the living God” (Matthew 16:16).
Jesus tells Simon Peter that this was not something he arrived at merely by “flesh and blood.” It was revealed to him by the Father (Matthew 16:17). Faith begins with grace. We can respond to God, but God must first open our hearts to recognize who Christ truly is.
Then something else remarkable happens. Jesus does not simply call him Simon. It is here that He gives him a new name: “You are Peter” (Matthew 16:18).
Of course, the name “Peter,” meaning rock, is directly connected to Jesus’ declaration that He will build His Church upon this rock. But there is another biblical significance to notice.
Throughout Scripture, when God gives someone a new name, it often marks a new identity and a new mission. Abram becomes Abraham (Genesis 17:5). Jacob becomes Israel (Genesis 32:28). God is not merely giving these people a nickname. He is marking a decisive moment in His relationship with them and the role they will play in His plan.
So when Jesus changes Simon’s name, He is doing something deeply biblical. Simon is being given a new identity in relation to Christ and a particular mission within Christ’s Church. The fisherman Simon who had followed Jesus is now Peter, the rock upon which Christ says He will build His Church (Matthew 16:18).
The first reading helps us understand what Jesus does next.
In Isaiah, God removes Shebna from his office and gives his authority to Eliakim. God says, “I will place the key of the House of David on Eliakim’s shoulder; when he opens, no one shall shut, when he shuts, no one shall open” (Isaiah 22:22).
That image of the key is not accidental.
Jesus, the true Davidic King, takes up this imagery when He says to Peter, “I will give you the keys of the kingdom of heaven” (Matthew 16:19). The authority belongs to Christ, but Christ entrusts a real authority of service to Peter.
The Psalm gives us the right attitude toward this gift of grace and authority: “When I called, you answered me; you built up strength within me” (Psalm 138:3). And the Psalm reminds us why we can have confidence: “Your kindness, O LORD, endures forever” (Psalm 138:8).
The Church prevails not because Christians are powerful. She prevails because Christ is faithful.
St. Paul takes us even deeper. After reflecting on the mysterious plan of God, he exclaims, “Oh, the depth of the riches and wisdom and knowledge of God!” (Romans 11:33). Everything ultimately comes from God, exists through God, and is ordered toward God: “For from him and through him and for him are all things” (Romans 11:36).
And that brings us back to those famous “gates.”
A gate belongs to a fortress. It is a defensive structure. When Jesus says that the gates of the netherworld will not prevail against His Church (Matthew 16:18), the image is not of Christians huddling behind the walls while evil attacks them. The gates are being stormed. The Church is advancing, and the gates of death and sin cannot ultimately hold against Christ.
That does not mean Christians are called to attack people. Our first battlefield is much closer to home.
It is our own heart.
Every time we reject sin, forgive instead of nursing resentment, tell the truth instead of lying, resist temptation, refuse gossip, care for someone who is suffering, give generously, defend someone who is vulnerable, or choose love when selfishness would be easier, the Kingdom of God advances.
The first gates of hell we are called to storm are the ones that sin tries to build in our own lives.
And we cannot do this by our own strength. We need grace. We need the Word of God. We need the Eucharist. We need the Church.
That is why Sunday Mass matters.
Mass is not simply an obligation to fulfill once a week. It is where Christ gathers His people, speaks His Word to us, gives us His own Body and Blood, strengthens us by His grace, and sends us back into the world to live the faith we profess.
Peter said, “You are the Christ, the Son of the living God” (Matthew 16:16).
The question for us is whether our lives say the same thing.
Come to Mass this Sunday. Receive the grace Christ gives us, strengthen your faith, and go back into the world ready to live it.
The gates will not prevail.
