Resource Detail

Revelation Lecture 6

I STAND AT THE DOOR AND KNOCK

Revelation 3:7-22

Key Verse 3:15

1. What does Jesus mean when he says, “What he opens no one can shut, and what he shuts no one can open” (7)? What might “little strength” mean (8)? What does Jesus commend the church in Philadelphia for?
2. What does it mean that they will fall down at the believers’ feet and acknowledge that Jesus has loved them (9)? What does Jesus mean by promising, “I will also keep you from the hour of trial” (10)?
3. What does it mean to “hold on to what you have” (11)? What do Jesus’ promises to make the victorious person “a pillar in the temple of my God” and to write three names on them mean (12)?
4. Why does Jesus introduce himself as “the Amen, the faithful and true witness, the ruler of God’s creation” (14)? What does it mean that the Laodicean church was “neither cold nor hot,” but “lukewarm” (15–16)? What will Jesus do to those who are lukewarm?
5. Why does Jesus describe them as “wretched, pitiful, poor, blind and naked,” even though they considered themselves rich (17)? What do the “gold refined in the fire,” “white clothes,” and “salve” symbolize (18)?
6. What does Jesus mean when he says, “Here I am! I stand at the door and knock” (19-20)? What does Jesus’ promise to “eat with that person, and they with me” reveal about? What does Jesus promise to those who are victorious (21)?

Revelation Lecture 6 Sep. 13, 2026

I STAND AT THE DOOR AND KNOCK

Revelation 3:7-22

Key Verse 3:20

Here I am! I stand at the door and knock. If anyone hears my voice and opens the door, I will come in and eat with that person, and they with me.

Before we begin today’s message, I would like us to look at a famous painting. Does anyone know its title or the name of the artist? This painting is called The Light of the World, by the English artist William Holman Hunt. It was inspired by Revelation 3:20: “Here I am! I stand at the door and knock.” The scene is covered in deep darkness, representing the spiritual darkness of the human heart without Christ. Yet Jesus has come through the darkness and is standing right outside the closed door. Look at Jesus. He is wearing a crown of thorns. He is the Savior who suffered and died for our sins. His face is filled with love, sorrow, and patience. The door represents the human heart. It is firmly closed, and there is no handle on the outside. It can be opened only from the inside. Jesus does not break down the door. Instead, he gently knocks and patiently waits for us to respond. Even now, Jesus is standing at the door of our hearts and knocking. Are you ready to open the door, welcome him in, and enjoy loving fellowship with him?

Today, we will learn about two very different churches: the church in Philadelphia and the church in Laodicea.

First, let us look at the church in Philadelphia. Does anyone know what the name Philadelphia means? It comes from two Greek words: philos, meaning “beloved” or “loving,” and adelphos, meaning “brother.” Together, philadelphia means “brotherly love.” If you have a friend who lives in Philadelphia, ask them if they know what their city’s name means. If they do not know, you can teach them! Ancient Philadelphia, one of the seven cities mentioned in Revelation, stood at the gateway from Lydia into Phrygia and the interior of Asia Minor.

In his message to the church in Philadelphia, Jesus describes himself as “him who holds the key of David.” The key of David, which comes from Isaiah 22:22, represents royal authority—the authority to open and close. Jesus’ holding the key of David means that he has sovereign authority over the kingdom of God. He alone can open and close the door to God’s kingdom.

Look at verse 8: “I know your deeds. See, I have placed before you an open door that no one can shut. I know that you have little strength, yet you have kept my word and have not denied my name.” Jesus knew all the faithful work the Philadelphia believers had done and every struggle they had endured for him. Then he said, “I have placed before you an open door that no one can shut.” With the key he holds, Jesus himself opened a door for them. This open door can be understood in two ways: as an open door to salvation and as an open door for mission.

First, Jesus opened the door of salvation. Those who gathered at the church in Philadelphia to worship Jesus were blessed to enter the kingdom of God. They could hear the truth of Jesus, develop genuine faith, and grow as his disciples. It was a healthy church that proclaimed salvation to the people. I pray that everyone who comes to our church hear the word of God, receive Jesus as their Savior, grow as his disciples, and live by faith. May none of us be lost, but may every one of us enter the kingdom of God.

Second, Jesus opened a door for mission. In the New Testament, the image of an open door is connected with the spread of the gospel. In Colossians 4:3, Paul asks the believers to pray that “God may open a door for our message.” Therefore, when Jesus said, “I have placed before you an open door,” Jesus was speaking of an open door for mission. Through the church in Philadelphia, Jesus opened a door for mission to many other cities and regions. But was Philadelphia a large church with many people and abundant resources? No! Jesus said, “I know that you have little strength.” “Little strength” does not mean that they were spiritually weak or lacking in faith. It means that they were small in number and had limited resources. The church in Philadelphia probably did not have much money, power, or recognition. Yet their limited strength did not prevent them from joining God’s mission. They kept Jesus’ word and did not deny his name. They were a small church with little strength, but they actively participated in God’s mission. Mission does not depend primarily on the size, wealth, or fame of a church. What matters most is whether Jesus has opened the door and whether we faithfully walk through it.

What is the mission? Some people understand the mission mainly as going to another country or culture to preach the gospel. Yes, that is certainly an important part of the mission. But mission does not always require us to cross national or cultural borders. In a broader sense, mission means sharing God’s love with people who do not yet know Jesus through both words and deeds. Therefore, the mission includes not only going overseas but also sharing the gospel with our neighbors, friends, coworkers, and the people we meet in everyday life. In fact, the boundaries between cultures are becoming less distinct today. This is especially true in a multicultural city like New York. Just look around your neighborhood. People from many different nations, cultures, and ethnic backgrounds live all around us. In that sense, our neighborhood is a mission field representing the whole world. God may call us to go to another culture as cross-cultural missionaries. But he also calls us to share the gospel of Jesus Christ with the people he has already placed around us. The mission begins right where we are.

Who is the main agent of the mission? It is the Triune God—the Father, the Son, and the Holy Spirit. Mission does not begin with our ideas or plans. It begins in the heart of God. God is the one who opens and closes the doors of mission. Therefore, we should not simply choose a certain place or group of people according to our own preferences. Instead, we must seek the guidance of the Holy Spirit through prayer and the word of God. When the Holy Spirit opens a door, we should enter it by faith and share the gospel.

I am deeply thankful that God has opened many doors for our campus ministry during the past year. He opened doors for Bible study at QCC, Queens College, and St. John’s University. He blessed many students to participate in campus group Bible studies. Please continue to support our campus ministries with your faithful prayers. Last year, God opened another door at Riverside Church, where we can hold Sunday worship services for those who study and live in Manhattan. By God’s grace, our Columbia and Manhattan ministry has now reached its first anniversary and is gradually becoming established.

At the same time, we need to widen the scope of our mission. Do you remember the kind of church we are praying to become under the guidance of the Holy Spirit? We want to become a Spirit-filled community, a campus mission-centered church, and a multicultural and multigenerational congregation. We want to follow the Holy Spirit and enter every door of mission that Jesus opens for us. God has blessed our Young Adult Ministry in remarkable ways over the past two years. We give thanks to God for his grace. I am also grateful to the leaders and members who have faithfully served this ministry. At present, our Young Adult Ministry is growing especially among our second-generation members. This is God’s work. He has opened this door for us. Now we are praying that he may work through our young adults and all of us to help us grow into a truly multicultural and multigenerational congregation. As God continues to open doors, we must share the gospel with our neighbors, friends, coworkers, and all those he brings into our lives. I believe that God has called every one of us to participate in his mission. Do you believe that God is calling you to participate in his mission? If so, let us actively participate in God’s mission by faith. May God help us see the doors he opens, enter them by faith, and faithfully carry out his mission.

Now let us turn to the church in Laodicea. Laodicea stood on a plateau overlooking the fertile valley of the Lycus River. The fertile land around the city produced abundant grain and other crops. The city was located along major trade routes connecting Ephesus with the interior of Asia Minor. This strategic location made Laodicea an important center of trade and commerce. Laodicea was especially famous for its luxurious black wool. This wool was used to make expensive clothing that was exported throughout the Roman world. The city was also an important financial center, where people exchanged money, made loans, and conducted other banking business. In addition, Laodicea was known for its treatments associated with the eyes. With its thriving trade, banking, textile industry, agriculture, and medicine, Laodicea became an extremely wealthy city. The people of Laodicea took great pride in their wealth and self-sufficiency.

In spite of all its wealth, Laodicea had one serious practical problem: it lacked a convenient local water supply. The city had to bring water in through a long system of aqueducts and pipes from springs several miles away. Hierapolis, about six miles to the north, was famous for its hot mineral springs. Its hot water was useful for bathing and healing. Colossae, about ten miles to the east, was known for cool water flowing down from the mountains. That cold water was refreshing to drink. But Laodicea’s water was different. By the time it reached the city through the aqueduct system, it was lukewarm and unpleasant. It was neither hot like the healing water of Hierapolis nor cold and refreshing like the water of Colossae. The city was rich in almost everything—but it could not provide its people with refreshing water. Jesus used this familiar image to reveal the spiritual condition of the church.

In some ways, New York City is similar to ancient Laodicea. It is a global financial center and one of the wealthiest cities in the world. Unlike Laodicea, New York City is also blessed with an abundant supply of clean, refreshing water. In fact, New Yorkers can generally drink water straight from the tap. We enjoy wealth, opportunity, comfort, and even good water.

However, living in such a good environment does not necessarily mean that we are in a healthy spiritual condition. Look at the church in Laodicea. Jesus did not offer them even one word of praise. Instead, he clearly pointed out what was wrong with their faith. Look at verses 15 and 16: “I know your deeds, that you are neither cold nor hot. I wish you were either one or the other! So, because you are lukewarm—neither hot nor cold—I am about to spit you out of my mouth.” What was their problem? Had they fallen into idolatry like some believers in Pergamum? Had they tolerated the teaching of a false prophet like the church in Thyatira? No. Jesus rebuked them because they were neither cold nor hot. Their faith had become lukewarm.

The Laodiceans knew exactly what lukewarm water was like. It was unpleasant and useless. In the same way, the Laodicean believers had become spiritually indifferent and ineffective. They were not openly rejecting Jesus, but neither were they passionately devoted to him. Their faith was somewhere in the middle—comfortable, halfhearted, and without spiritual power. We know God’s greatest commandment: “Love the Lord your God with all your heart and with all your soul and with all your strength” (Deut 6:5). God wants our wholehearted love. But lukewarm faith says, “Jesus, I love you—but only up to a certain point.” We may give Jesus our Sunday morning but keep the rest of the week for ourselves. We may say, “Lord, you can have this part of my life, but please do not touch my career, my money, my relationships, or my plans.” A lukewarm Christian may attend worship regularly, give offerings, and join meetings during the week. But they have set a limit on how far they will follow Jesus. They say they love God, but they also love the world. They want to please God, but they do not want to give up their comfort or pleasure. Jesus said, “I wish you were either cold or hot.” Then he warned them, “Because you are lukewarm—neither hot nor cold—I am about to spit you out of my mouth.” This is a very strong expression. Jesus was saying that their lukewarm spiritual condition was completely unacceptable to him. It made him sick.

Then how did the believers in Laodicea fall into such a lukewarm spiritual condition? The problem was that they could not see their true spiritual condition. They had made the wrong diagnosis of themselves. “You say, ‘I am rich; I have acquired wealth and do not need a thing.’” They were filled with spiritual complacency. They thought, “My spiritual life is fine. I am financially secure. I attend worship every Sunday, and I give my offering. I am doing well. I don’t really need anything more.” Because they felt that they needed nothing, they did not seek Jesus or depend on him. When they faced a problem, they could simply depend on their money. They had little desire to know Jesus more deeply. They did not feel the need to long for God’s eternal kingdom. After all, if this world already feels like heaven, why would they hunger for the kingdom of God?

But their self-diagnosis was completely wrong. How did Jesus diagnose the church in Laodicea? “But you do not realize that you are wretched, pitiful, poor, blind and naked” (17b). They thought they were happy and successful, but Jesus said they were wretched. They were proud of themselves, but Jesus said they were pitiful. They believed they were rich, but Jesus said they were poor. They were famous for eye treatments and thought they could see clearly, but Jesus said they were blind. They wore expensive clothing made from luxurious black wool, but Jesus said they were naked. Their self-evaluation and Jesus’ evaluation were completely different. So who was right? Of course, Jesus’ diagnosis was accurate.

Then what about us? How do we evaluate our spiritual condition? We may say, “I think I am doing fine.” But what would Jesus say when he looks into my heart? And what about our church? Would he see a church that loves him wholeheartedly, depends on him, and faithfully carries out his mission? Or would he see that we have become comfortable, self-sufficient, or lukewarm? We need to lay aside our own evaluation and humbly listen to the faithful and true diagnosis of Jesus.

Jesus said to the believers in Laodicea, “Those whom I love I rebuke and discipline.” Jesus had not given up on the Laodicean church. He still loved them. He rebuked and disciplined them because he wanted to restore them. His rebuke may be painful, but it is not meant to destroy us. It is meant to awaken us, turn us around, and bring us back to him. “Be earnest and repent.” The word translated “earnest” can also mean “zealous.” In other words, Jesus is saying, “Be passionate and turn back to me.” But how can we return to Jesus? Let us read verse 20 together: “Here I am! I stand at the door and knock. If anyone hears my voice and opens the door, I will come in and eat with that person, and they with me.” Where was Jesus? Surprisingly, he was standing outside the door of his own church. The believers were gathering for worship and carrying out their religious activities, but they had left Jesus outside. Still, Jesus stood at the door and knocked. He called them and patiently waited for someone to hear his voice and open the door. Jesus wants to come into our hearts and share our lives. Jesus wants to restore that deep and loving relationship with us. He wants to have a close friendship and personal fellowship with us. Even now, Jesus is standing at the door and knocking. If we hear his voice, repent, and open our hearts, he will come in. He will restore our loving relationship with him.

John Stott, in his book What Christ Thinks of the Church, said that among the seven letters in Revelation, perhaps none speaks more directly to the twenty-first-century church than the letter to Laodicea. Stott described the condition of our churches: “Our Christianity is flabby and anaemic,” in other words, “Our Christianity is weak and lifeless.” Comfortable Christianity does not transform our lives. It does not give us the courage to resist the sinful values of the world or the passion to share the gospel. Instead of influencing the world, we gradually become more like the world. Jesus speaks clearly to the church today: “Be earnest and repent!” Jesus stands at the door of our hearts and knocks. May God help us repent, open the doors of our hearts, have close fellowship with Jesus, renew our passion for Christ, and actively participate in God’s mission like the church in Philadelphia. Amen.