2 - Only the Blood

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John 1:29 NLT

29 The next day John saw Jesus coming toward him and said, “Look! The Lamb of God who takes away the sin of the world!

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Opening: The Mark That Meant Life

Good morning, church. It is good to see you this morning.

Let me start with something that probably feels more familiar than we would like to admit. Have you ever noticed how many things in life look secure right up until the moment they are tested?

For example: A bridge looks strong until it is not.

US Route 1 Bridge near Quantico, VA deck failure in 1983

A roof looks dependable until the storm comes.

A savings account looks comforting until the refrigerator goes out on Saturday night, repair bill lands, the transmission goes out, and suddenly what felt like security starts looking thinner than it did the week before.

Most of us do not really know what we trust until something presses on it.

That is not just true financially. It is true spiritually. There are people who feel fine with God when life is calm, when everything is ordinary, when nobody is asking deep questions, when consequences are distant and eternity feels like an abstract idea. But the moment judgment shows up as more than a theological word, when the reality of standing before a holy God stops feeling theoretical and starts feeling personal, everything changes.

Suddenly the question is no longer, “What do I generally believe?” The question becomes, “What is actually going to hold when everything is tested?”

Exodus 12 meets us right there.

Object lesson option: Hold up a house key, and then a small umbrella. Say, “These things feel useful, but only if they can actually protect you when protection is needed.” Then set it down and move into Exodus.

In our story today: Israel is not just uncomfortable in Egypt. Israel is bound. They are living under a tyrant they cannot overthrow, under a system they cannot change, under a burden they cannot lift from themselves. They have no way out that originates in them. And by the time we get to Exodus 12, the pressure in the story has become almost unbearable. Warning after warning has gone out. Plague after plague has struck. The narrative has narrowed itself down to one terrible reality: judgment is coming.

And whenever judgment moves from theory into reality, the question gets very simple very fast: What, exactly, is going to save you?

Read slowly: Exodus 12:13 “When I see the blood, [pause, then repeat] I will pass over you, and no plague will befall you to destroy you, when I strike the land of Egypt.”

That phrase from Exodus 12:13 is the anchor of our sermon: “When I see the blood.” Not when I see your confidence. Not when I see your panic. Not when I see your best explanation. But: “When I see the blood.”

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Main Teaching: Why the Blood Mattered

Our teaching today comes from the Passover in Exodus.

But before we look at the details of Passover, we need to understand the central question of the story: Why did the blood matter so much? On that unforgettable night in Egypt, the difference between life and death was not wealth, morality, nationality, or effort. God provided a way of rescue as described in Exodus 12:1-14 and specifically in Exodus 12::13, when He called His people to trust that provision: “When I see the blood” . The blood on the doorposts became a visible sign of faith in what God had said. As we walk through this passage, we will discover three truths:

the reality of judgment,

the necessity of a substitute,

and the power of God's provision.

Together, they point beyond Egypt to Christ, our perfect Passover Lamb. Now let’s go deeper:

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Point 1: Bondage Means You Need More Than Advice

One of the most important things Exodus teaches us is that Israel does not need ideas. Israel does not need motivation. Israel does not need a seminar on positive thinking. Israel needs rescue.

That matters because we love to reduce sin to something manageable. We talk about mistakes. We talk about poor choices. We talk about bad habits. There is a place for those words, but none of them go deep enough. The New Testament says, “Everyone who practices sin is a slave to sin.” That is John 8:34. That is not the language of inconvenience. That is the language of bondage.

Bondage changes what kind of help you need. If somebody is confused, advice may help. If somebody is tired, rest may help. If somebody is discouraged, encouragement may help. But if somebody is enslaved, none of those things are enough by themselves. Enslaved people do not merely need inspiration. Enslaved people need deliverance.

Illustration: Use the quicksand picture below, inside the argument, not as a separate illustration block. Think of quicksand. Nobody steps into quicksand and says, “I think I’ll just stroll my way out of this.” The more a person thrashes in panic, the deeper that person sinks. That is the deception of sin. Sin tells you that one more effort from you will be enough, while proving over and over that your effort cannot free you from what has already taken hold.

And sin is not a polite houseguest. Sin is the kind of houseguest who says, “I’ll only stay five minutes,” and ends up eating your food, sleeping on your couch, using your Wi-Fi, and acting like it pays the electric bill. That is funny because it is familiar. But underneath the humor is a serious truth: sin never stays where it promised it would stay.

That is the condition of Israel in Egypt, and it is the condition of humanity apart from Christ. The issue is not simply that people occasionally do wrong things. The issue is that sin has a hold on the human heart strong enough that we cannot pull ourselves free by willpower, shame, or good intentions.

That is why Exodus matters. It refuses to flatter us. It does not present the people of God as mildly inconvenienced or temporarily underperforming. It presents them as people who need what only God can do.

Delivery cue: Say, “So, today see Israel first. [pause] Then we’ll let the text show us ourselves.”

And into that bondage God speaks a way of rescue. Not advice. Not improvement. Not moral coaching. Rescue.

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Point 2: God’s Answer Is a Lamb, Not a Ladder

So what does God give His people in the face of judgment? He does not give them a ladder. He does not say, “Climb. Improve. Reach. Impress Me.” He gives them a lamb.

That is stunning in its simplicity. The instructions come in Exodus 12, and they are almost unsettlingly plain. Take a lamb without blemish. Kill it. Put the blood on the doorposts and the lintel. Eat in haste. Be ready. The entire night narrows itself down to one appointed provision.

Now pause there, because the simplicity of it is exactly what makes it hard for proud people to receive. We expect something larger, something that feels proportionate to the seriousness of the moment. We expect effort. We expect contribution. We expect some explanation that leaves room for us to feel a little dignified. But God leaves little room for dignity here. He leaves room for trust.

“When I see the blood.” Not when I see your tears. Not when I see your promises. Not when I see that you meant well. “When I see the blood.”

That means the safety of the house does not finally rest on the strength of the people inside it. It rests on what covers them.

Object lesson callback: If using the umbrella, open it briefly here. Say, “The question is not how brave you are in the storm. The question is whether you are covered.”

Imagine a thunderstorm rolling in over a wide field. There is nowhere to hide and nowhere to run until you finally reach a sturdy shelter. Once you are inside, the difference between being outside and being under cover is not your courage. It is your location. It is what now stands between you and what would otherwise destroy you. That is Passover. The blood is not decoration. The blood is covering.

This is why self-righteousness is such bad theology. It is basically standing in the middle of a thunderstorm holding a metal rake and saying, “I think I’ve got this.” No, you do not. What you need is shelter, and God provides it.

Just imagine that night in Egypt. Some households were probably calm, some terrified, some full of questions. Perhaps one father had unwavering faith and spoke confidently to his family. Maybe another father’s hands were shaking as he applied the blood. Maybe one child kept asking, “Why are we doing this?” Maybe another child did not ask anything at all. But none of those emotional differences were the deciding factor. The deciding factor was the blood.

This is where the Gospel becomes dazzlingly clear. God’s answer to bondage and judgment is substitution. Something innocent stands in for the guilty. Something without blemish is appointed for people with blemish. The lamb dies so the household may live.

And Scripture will not let us miss the connection. John the Baptist sees Jesus and says, “Behold, the Lamb of God, who takes away the sin of the world!” Paul says in 1 Corinthians 5:7, “Christ, our Passover lamb, has been sacrificed.” The whole Bible is saying that what was foreshadowed in Egypt has arrived in Christ.

Read slowly: Read Exodus 12:3 and Exodus 12:5 first. Let the lamb imagery form. Then read 1 Corinthians 5:7 so the room feels the connection: “Christ, our Passover lamb, has been sacrificed.”

Now let’s look at 3 separate verses:

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Exodus 12:3 ESV

3 Tell all the congregation of Israel that on the tenth day of this month every man shall take a lamb according to their fathers’ houses, a lamb for a household.

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Exodus 13:5 ESV

5 And when the Lord brings you into the land of the Canaanites, the Hittites, the Amorites, the Hivites, and the Jebusites, which he swore to your fathers to give you, a land flowing with milk and honey, you shall keep this service in this month.

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1 Corinthians 5:7 ESV

7 Cleanse out the old leaven that you may be a new lump, as you really are unleavened. For Christ, our Passover lamb, has been sacrificed.

God’s answer is a lamb, not a ladder. And that is good news, because ladders are for people strong enough to climb. The lamb is for people who need to be rescued.

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Point 3: The Blood Must Be Applied

This is where the story gets deeply personal. It is one thing for a lamb to exist. It is another thing for the blood to be applied.

You could have had a family in Egypt that admired the instructions and still died. You could have had a household that agreed Moses was a man of God and still died. You could have had people inside the house who liked the symbolism, appreciated the ceremony, and still died. Because the issue was not admiration. The issue was application.

That matters because many people live around the Gospel the way someone in Egypt could have lived around the lamb. Familiar. Respectful. Interested. Maybe even emotionally moved by the story. But the question is not whether Jesus is a powerful idea to you. The question is whether you are actually under what God has provided.

Illustration: Use the boarding pass illustration below as application, not an isolated example.

Think of a boarding pass at an airport gate. You can admire the plane, read the airline magazine, memorize the departure time, and tell people all day long that you believe the plane exists. But at some point, what matters is whether you have actually come under the document that grants you passage. The issue is not whether you appreciate the idea of flight. The issue is whether you are on board.

In the same way, the issue is not whether Jesus interests you. The issue is whether your life is under His blood.

Faith is not vague appreciation. Faith is trusting what God has appointed enough to come under it.

Hebrews 9:22 says, “without the shedding of blood there is no forgiveness of sins.” That is not because God enjoys violence. It is because sin is not light, and forgiveness is not cheap. Something must bear the cost. The Gospel says that Christ has borne it.

Delivery cue: Say plainly, “The blood is enough.” Pause. Then repeat it: “The blood is enough.”

But again, the blood must be applied. Not by adding anything to what Christ has done. Not by improving the sacrifice. Not by becoming worthy of it. Bur by trusting it. By placing the weight of your hope there, and nowhere else.

And this is where our sermon turns toward the room. What are you trusting to make you right before God? All of us trust something. Some people trust their morality. Some trust their church background. Some trust their sincerity. Some trust the fact that they are not as bad as the next person. Some trust a future version of themselves that will finally become spiritual enough to settle this.

But Exodus keeps narrowing the field until only one answer remains: “When I see the blood.”

Not your personal record. Not your future potential. Not your level of effort. But the blood.

There are some people who treat salvation like free samples at the grocery store. They enjoy a taste, they smile politely, they move on to the next thing, and somehow convince themselves that snacking around grace is the same as feeding on Christ. It is not. The blood is not a sample. It is life or death.

That is why the Gospel is both offensive and comforting. Offensive, because it tells proud people that their efforts are insufficient. Comforting, because it tells weary people that Christ is sufficient.

The Gospel does not finally say, “Try harder.” It says, “Come under what God has provided.” The blood carries what your effort cannot. The Lamb does what you cannot do for yourself.

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Closing: What Covers You?

So let me leave you with the question this text presses on every soul: What covers you?

Not what impresses people. Not what calms you temporarily. Not what sounds spiritual in a conversation. What actually covers you?

Final object lesson option: Hold up the umbrella, and key again. Say, “Some things look like security until they are tested. Exodus asks what can actually cover your soul.”

Because one day every false shelter will be exposed. Every flimsy confidence will be tested. Every excuse will collapse under the weight of reality. And when that day comes, the only answer that will hold is the one God Himself has given.

“When I see the blood.”

Delivery cue: Soften the tone here. Let the sentence settle. Do not race to the prayer.

The beauty of the Gospel is not that God lowered His standard. The beauty of the Gospel is that God provided the Lamb. The beauty of the Gospel is that He looked at people who could not save themselves and made a way that did not depend on their ability to rescue themselves.

So if you are tired, come under the blood. If you are ashamed, come under the blood. If you are trying to perform your way into peace, stop and come under the blood.

Because what covers you will determine what carries you. And the only covering that can stand before judgment is the covering God Himself has provided in Christ.

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Closing Prayer

Father, Thank You that our safety does not rest in our sincerity, our strength, or our striving. Thank You for the Lamb. Thank You for the blood that covers. Thank You that when judgment comes, You have not left us to stand there with our own best efforts in our hands. You have provided what we could never provide for ourselves. Teach us to trust completely in what You have done. Strip away false confidence. Expose flimsy shelters. And bring us gladly under the covering of Christ.

In His name we pray,

Amen.