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Gospel of John
The Light of the World  ·  John 8:12-30  ·  July 5, 2026  ·  ▶ Watch

Introduction

A young man on his first week driving a delivery truck backs it straight into the owner’s pickup in the parking lot. He hears the crunch before he sees it. But most of us know a smaller, quieter version of this feeling every night of our lives. You wake up in the dark. The house is asleep. You need water, or you need to check on one of the kids, and you swing your legs off the bed and start walking. You’ve walked this path a hundred times. You know your house. You’re confident — you’ve got this.

And then your shin finds the corner of the bed. Or your toe finds that chair someone moved when you weren’t paying attention. And suddenly the pain is instant, and a little unreasonable. There you are, standing in the dark, hopping on one foot, trying not to wake the whole house — and you realize you’re more lost in that room than you ever imagined. The darkness had you convinced you could see. It only took one collision to prove you couldn’t.

That’s kind of where we find ourselves this morning in John chapter 8. Jesus is standing in the temple teaching, just after the Feast of Tabernacles, and he makes one of the most extraordinary claims you could ever imagine. To feel the full weight of it, you have to know what’s happening around him.

The Feast of Tabernacles was a week-long celebration, and one of its most dramatic moments was called the illumination of the temple. Every evening in the Court of the Women, they lit four enormous golden candles — the Mishnah says they were seventy-five feet tall. Every evening they lit them, and all of Jerusalem glowed. The people stayed up through the night singing and dancing, because those lights were a picture: the pillar of fire that led Israel through the wilderness after the exodus. The whole feast was a reminder that God does not leave his people stumbling around in the dark.

And right there, with the memory of those massive lights still fresh in everyone’s minds, Jesus stands up and says, “I am the light of the world.”

1. THE CLAIM (vv. 12-18)

Let’s read it together. “Again Jesus spoke to them, saying, ‘I am the light of the world. Whoever follows me will not walk in darkness, but will have the light of life.’ So the Pharisees said to him, ‘You are bearing witness about yourself; your testimony is not true.’ Jesus answered, ‘Even if I do bear witness about myself, my testimony is true, for I know where I came from and where I am going, but you do not know where I come from or where I am going… In your Law it is written that the testimony of two people is true. I am the one who bears witness about myself, and the Father who sent me bears witness about me’” (John 8:12-14, 17-18).

Jesus didn’t say, “I come to offer you light.” He didn’t say, “I come to point you toward the light.” He said, “I am the light.” Those candles were just a representation — seventy-five feet of golden lampstand, and even that is hard for us to picture. But Jesus is saying something bigger than any lampstand. I am the light. Not a light for Israel only, but for everyone. Every lampstand they’d been celebrating around all week eventually goes out. Jesus never does. Those lamps were a picture, a symbol, a reminder of what God had done for them. Now Jesus says: what those lights pointed to, that’s me. And I don’t go out.

2. THE PROMISE AND THE COST (v. 12)

“Whoever follows me will not walk in darkness.” When Israel wandered the wilderness at night, if they had no light it would have been dangerous — ravines, cliffs, all kinds of places to get hurt. That’s a good picture of what this life is like. It’s easy to wander around in the dark and hurt ourselves, physically, spiritually, emotionally. Jesus says, if you follow me, you will not walk in darkness. But notice — that’s not a promise of information. It’s a promise of love. This isn’t just clarity about doctrine or morality. It’s changing the way you walk through life. Follow me, he says, and you’ll stop stumbling. You’ll stop tripping over things. You’ll stop hitting your toe on the corner of that same bed in a very literal, ongoing sense.

But following means going where he goes. And that’s the hard part.

I remember the one and only time I ever went raccoon hunting with my dad and my uncles. They talked about it like it was the greatest thing in the world — running the dogs through the woods at night. All I could think as a kid was, I don’t want to chase a dog through the woods in the dark. That doesn’t sound fun at all. But they finally talked me into it, and for over an hour all I could do was stand there thinking, I don’t know where I’m at. The dogs are gone. My flashlight barely works. I’m just stuck in the dark. I couldn’t say I know where I’m at and I know where I’m going. That’s what Jesus is offering us. You don’t have to wander around lost anymore. But you have to follow — you have to go where the light goes, not just admire it from where you’re standing.

3. THE WARNING (vv. 19-24)

The Pharisees press him. “They said to him therefore, ‘Where is your Father?’ Jesus answered, ‘You know neither me nor my Father. If you knew me, you would know my Father also’… So he said to them again, ‘I am going away, and you will seek me, and you will die in your sin. Where I am going, you cannot come’… ‘unless you believe that I am he you will die in your sins’” (John 8:19, 21, 24).

Here’s the aspect of this passage we’ve all heard a hundred sermons on, and the point is usually the same: believe in Jesus, believe in his word, be saved. But listen to what he’s actually saying here. You can’t really know the Father apart from knowing me. Here’s the thing — it’s possible to know the Bible. It’s possible to know all about Jesus Christ, and still miss Jesus. These men in the temple knew who he was. They knew his mother, his father, his brothers and sisters. They knew where he grew up. They knew everything there was to know about him. But they didn’t know him.

If you really knew me, Jesus says, it would be different. Your faith would be different. That’s something we can hold on to, because it’s the essence of what it means to walk as a Christian. If you really knew — and really believed — it would change everything. It would change your wandering in the darkness. It would change everything about how you love. And the question for us this morning is simple: has it? I look at my own life and I want to say yes, absolutely. But when I get honest about it — has it really changed everything for me? We don’t want to say no. We’re pretty good at pretending, pretty good at going through the motions, pretty good at deciding for ourselves where we want to go and how we want to get there. We think we know how to get through our own bedroom in the middle of the night.

But once you’ve stood in the dark for a while — once you’ve stumbled a few times — even a little light seems more powerful than you’d expect. That’s what Jesus is saying. Once you’ve wandered, a little light changes everything. Unless you believe, you’ll keep tripping over the same things, hurting yourself in the same old ways, repeating the same old patterns. Knowing about the light is not the same thing as walking in the light. Most of us carry more information about Jesus at our fingertips than believers had for a thousand years of church history. We don’t need more information. We need different hearts — a different level of commitment to actually walking in the light we already know about.

4. THE INVITATION (vv. 25-30)

“So they said to him, ‘Who are you?’ Jesus said to them, … ‘When you have lifted up the Son of Man, then you will know that I am he, and that I do nothing on my own authority, but speak just as the Father taught me. And he who sent me is with me. He has not left me alone, for I always do the things that are pleasing to him.’ As he was saying these things, many believed in him” (John 8:25, 28-30).

When you have lifted up the Son of Man, then you will know. For the Jews standing there, that meant the day they would see him hanging on the cross. But I want you to hear that a little differently this morning. Have you lifted up the Son of Man in your own life — in your own heart, in your own mind? Because when you do, it changes everything, and it’s obvious. When you’re wandering around in the darkness and you stumble over something, there’s no wondering whether it happened. It’s immediate. It’s painful. It’s true. That should be true of our faith too. If I’ve really lifted up Jesus Christ in my heart and my life, the people around me should be able to tell. If you met a total stranger today, would they walk away thinking, that’s a Christian? I have to admit that’s a hard question for me. Every one of us is going to walk out of here today and go about an ordinary afternoon — driving somewhere, eating somewhere, talking to somebody who has no idea what kind of morning we just had. Will the people we meet out there see it?

The cross does not put out the light. It is where the light blazes at its fullest strength. When I lift up the Son of Man, that’s when the light really shines — for me, and for the people watching. As Jesus said elsewhere, a city set on a hill cannot be hidden. You can’t put that light out. It’s going to shine, and people are going to see it.

Conclusion

Jesus stands here in the middle of this passage and says, I am the light of the world. Whoever follows me will not walk in darkness. He will lift up the Son of Man, and you will know — and they will know. The light of the world is still shining. Follow him, and you will have the light of life.

That’s the challenge before us this morning. Am I really following him? Am I really lifting him up? Do I really believe in him? That’s a hard question, church, but it’s always there, and it’s always available. If you want the light of life, if you want the light of this world, it’s there, and he’s ready to welcome you in. If you’re willing to lift him up, you’ll know, and you’ll believe, and you will not die in your sins.

Church, if we can help you in any way, if we can encourage you — won’t you come, as we stand and as we sing?