Heart of Darkness

Mark 7:1-23 February 21, 2021 Pastor Ricky Alcantar
Thesis The heart of the problem is our heart, but Jesus aims his ministry at the heart of our problem by offering his righteousness in exchange for our defilement and renovating our hearts by the Spirit.
Series
Type
Expository
Tone
pastoralpropheticdidactic
Method
grammatical-historicalredemptive-historicalcanonicalapplicatory
What's in this sermon

The shape of the argument

35 units across exposition, application, illustration, theological claim, and conclusion. The pastor's argument is built from these moving parts.

Pastoral correction · unit #30
"Applies the horizontal solution to Christian sanctification. Contrasts fruit-stapling (external behavior modification) with heart-directed ministry. Uses anger as test case: external solutions (remove triggers) fail; heart-level solutions (identify idolatry, dethrone self, apply gospel truth) succeed. Sanctification requires Spirit-dependence, not self-effort."
Doctrinal loci· 12 surfaced
Hamartiology · 17 Soteriology · 11 Bibliology · 6 Anthropology · 5 Christology · 5 Sanctification · 4 Ethics / Moral Theology · 3 Pneumatology · 2 Ecclesiology · 1 Eschatology · 1 Pastoral Theology · 1 Theology Proper · 1
Bible citations· 16
Mark 7:15 | Mark 7:1-5 | Mark 7:6-9 | Isaiah (prophet cited in Mark 7) | Exodus 20:12 (Ten Commandments - honor father and mother) | Mark 7:10-13 | Mark 7:14-23 | Zechariah 3 | Zechariah 3:1 | Zechariah 3:4 | Zechariah 3:8 | 2 Corinthians 5:21 | Revelation 19 | Ezekiel (heart of stone) | Ephesians 4:22-24 | Mark 6:56
Illustrations· 3
  1. cultural reference · unit #1 — Uses Joseph Conrad's *Heart of Darkness* to illustrate the sermon's controlling question. The literary reversal—Kurtz is not the victim of the jungle but the source of evil within it—parallels the sermon's claim that humanity's problem is internal, not external.
  2. analogy · unit #12 — Translates the obscure Corban practice into a contemporary scenario: the easy chair illustration. Demonstrates how religious technicalities can be weaponized to avoid genuine love and obedience. Establishes that the human heart is expert at finding loopholes in any system.
  3. analogy · unit #15 — Uses Paul Tripp's fruit-stapling metaphor to visualize the futility of external religion. The image is absurd—stapling grocery-store fruit onto dead branches—yet it captures exactly what human religious systems do: attach manufactured righteousness to unregenerated hearts. Jesus' diagnosis goes beneath the stapled fruit to the rotting root.
Theological claims· 10
  1. The heart of the problem is our heart—humanity's fundamental issue is internal, not external. unit #2
  2. Self-righteousness blinds us to our real problem because it prevents us from ever seeing ourselves as the problem. unit #5
  3. Human religion blinds us by obscuring the heart of God's law with layers of external traditions, shifting our focus from loving God and neighbor to mere rule-keeping. unit #8
  4. The Pharisees are not a distant religious curiosity but a mirror reflecting our own blindness to the heart's corruption through external religion. unit #14
  5. Jesus' diagnosis remains countercultural because we instinctively blame external factors for our sin when Jesus locates the source in the human heart. unit #18
  6. The contemporary command to 'follow your heart' is spiritual disaster when Jesus teaches that the heart is the corrupted source of sin, not the solution to our problems. unit #19
  7. Our internal defilement creates two unsolvable problems: it alienates us from God vertically and damages others horizontally through the sins that flow from our hearts. unit #20
  8. Despite maximum religious effort, the high priest Joshua stands before God in garments covered in excrement, revealing that no external ritual can remove internal defilement. unit #22
  9. Jesus does not offer more religion but a complete exchange: abandon your filthy garment and receive his righteousness purchased by his blood. unit #24
  10. Jesus solves the horizontal dimension of our defilement by the Spirit's work of removing our heart of stone and giving us a heart of flesh that increasingly resembles God's heart. unit #28
Quotations· 1
"The jargon of the philosophy of progress taught us to think that the savage and primitive state of man is behind us, but barbarism is not behind us, it is within us." — Lord David Cecil (unit #17)
Read it

Full transcript

31,882 characters 35 units ~35 min reading time Listen instead →

0 · Opens with communal greeting and pandemic-era social distance humor

Faces today, that is awesome. Take a second and look at your neighbor. Don't get too— don't get within 2 chairs, but look at your neighbor, wave at them, and be like, you have a beard now, or your beard looks grayer than last I saw you.

It is good to see you guys. Good to be in the house of the Lord today. We're gonna be in Mark chapter 7 today, Mark chapter 7, and I'm gonna read just one verse up front that is the theme verse 'cause we're gonna cover a number of verses today. So this is kind of what we're gonna hone in on today. Mark 7:15, this is Jesus' words to us.

"There's nothing outside a person that by going into him can defile him, but the things that come out of a person are what defile him." This is God's word.

1 · Uses Joseph Conrad's *Heart of Darkness* to illustrate the sermon's controlling question

Now, A few years ago, I read a book called The Heart of Darkness. And doesn't that sound fun? I thought it was gonna be almost like an Indiana Jones style adventure because it's about a guy who, turn of the 20th century, goes into the Congo to look for this mysterious figure that had been lost named Kurtz. Kurtz was supposed to be this exceptional man, this genius, this talented person.

And so the main character's making his way through the jungle and down rivers. He's attacked by native people and there's all these accidents and strange occurrences. And you begin to wonder like, oh no, Kurtz, like this great man, what's happened to him? What is the jungle? What bad things is the jungle bringing on this poor soul?

So finally he gets all the way down, you know, into the jungle and finds Kurtz and discovers that rather than all the bad things in the jungle happening to Kurtz, Kurtz is actually the source of all the evil in the rest of the book. He's the guy that's ordering the native people around, has them convinced he's a god. He's the people scamming other people. He's manipulating the whole area. He's like the villain of the book when you think he's the rescue mission.

And in a similar way, I remember thinking like, well, that's weird. I thought he was the good guy and he ended up being the bad guy. I thought the problem was outside of him. The problem is him. He's the problem.

2 · Transitions from illustration to direct doctrinal claim

And this gets at one of the most fundamental human questions that we deal with, which is, where is our real problem as humanity? Where is our real problem as people? Is our problem really outside of us somewhere, or is our problem perhaps something more terrifying? Our problem could be ourselves. And so, I promise this is gonna have a positive uptick at the end of the sermon.

But we're gonna slog through some, like, man, that's tough to see. This passage is somewhat of a mirror for us. And when we look in the mirror, we don't see quite what we hope to see when we start out. So the main idea today is the heart of the problem is our heart. The heart of the problem is our heart.

3 · Signals entry into the first major section of the sermon

Section 1, blind to the problem. Now, we're gonna see 3 ways that the Pharisees in this section are blind to the real problem and they believe the problem is outside of them when the problem is inside of them.

4 · Direct exposition of Mark 7:1-5

So first way that they're blinded is being blinded by self-righteousness. Look at verse 1. Now when the Pharisees gathered to him with some of the scribes who had come from Jerusalem, they saw that some of his disciples ate with hands that were defiled, that is, unwashed.

Now, side note, that doesn't mean, this is not like a hygiene thing. It's not like, okay, we're in a pandemic, You probably should be washing your hands. You know, we had those videos going around, "This is how you do it. You got to do it like this," and, you know, and you're like, "My hand's a pretzel now. Is that what I'm supposed to be doing?" This is not a hygiene thing.

This is a ritual thing. They'd wash themselves and the water would flow one way and then the water would flow another way. They'd be ritually cleansed. "For the Pharisees and all the Jews do not eat unless they wash their hands properly, holding to the tradition of the elders. Or when they come from the marketplace, They do not eat unless they wash. And that word actually could mean bathe.

Like you go to Walmart, before you could sit down for dinner, you've got to take a bath and then come back to dinner. There are many other traditions they observe, such as the washing of cups and pots and copper vessels and dining couches, right? They had regulations even for washing the cups, right? The dishes going in the dishwasher, no, you didn't do it right. You did counterclockwise.

It's clockwise, and then in and then out, right? This is where they are. Verse 5, and the Pharisees and the scribes asked him, why do your disciples not walk according to the tradition of the elders, but eat with defiled hands?

5 · Draws doctrinal conclusion from the exposition: the absurdity of the Pharisees correcting the sinless Christ reveals the blinding power of self-righteousness

Now, here's the problem we see with the Pharisees up front. They are standing in front of Jesus, right?

Jesus has literally been walking around healing people. He's been calming storms. He's been restoring people back from the dead. He's been feeding the hungry, right? He is the only sinless human being that's ever lived, the only righteous person who's ever fully righteous person that's ever lived, and the Pharisees come to him and say, "Listen, Jesus, you know, you're not like us.

I mean, we're pure over here, and you guys are just a mess." I mean, and you just think, in the context of the Gospels, you're meant to think, "This is insane. Who marches up to Jesus and says, 'You got a little something here. I mean, just, I can help you out. I got it.'" Right? How do you get there?

Well, here's the thing. The first thing that will blind us to seeing our real problem is our own self-righteousness. It is impossible to ever see what the real problem is if we always assume that we are not the problem, right?

Where this fits

Recent preaching context

The three sermons immediately preceding this one in the preaching schedule.

Jan 24, 2021
The difficulties of 2020 revealed that we belong not to ourselves but to God, and embracing this truth transforms our anxiety into trust, our anger into worship, and our consumerism into sacrificial love for the church.
Romans 14:7-9
Jan 31, 2021
Feb 14, 2021
Our storms reveal that Jesus is both higher than we think—sovereign over all creation as the wave-walking God—and nearer than we think—the incarnate Savior who climbs into the boat with doubters and sinners.
Mark 6:45-52
February 21 · This sermon
Heart of Darkness
The heart of the problem is our heart, but Jesus aims his ministry at the heart of our problem by offering his righteousness in exchange for our defilement and renovating our hearts by the Spirit.
Mark 7:1-23
Take it further

Discuss · apply · pray

Small-group discussion

6 questions for your group this week

  1. When Jesus says in Mark 7:15 that nothing outside a person can defile them, but rather what comes out of their mouth proceeds from the heart—what does he mean by 'the heart' here? What is he claiming about where our real problem originates?
    Mark 7:15
    → Can you think of a time when you blamed external circumstances for your sin, when Jesus would say the problem was actually coming from inside you?
  2. The Pharisees had built an entire system of external rules and traditions (hand-washing, Corban practices) to pursue righteousness. Why does Jesus say this approach actually blinds them to their real spiritual condition?
    Mark 7:1-13
    → Where do you see this same pattern today—people using external religious practices or rule-keeping to feel right with God without addressing what's actually in their hearts?
  3. In Mark 7:21-23, Jesus lists the sins that flow from the human heart: evil thoughts, sexual immorality, theft, murder, and others. How does this list challenge the common cultural message to 'follow your heart'?
    Mark 7:21-23
    → Which of these heart-sins do you see operating most visibly in our culture right now, and how does Jesus' diagnosis change the way you think about the solution?
  4. The sermon references Zechariah 3, where the high priest Joshua stands before God in filthy garments. What does this image teach us about the problem that external religion cannot solve?
    Zechariah 3
    → What would it look like to stand before God 'in filthy garments'—aware of your actual spiritual condition rather than hiding behind external righteousness?
  5. Jesus offers a complete exchange: he gives us his righteousness (purchased by his blood on the cross) and removes our filthy garment. How does this vertical exchange with God through Christ address the heart problem in a way that rules and traditions never could?
    2 Corinthians 5:21
    → What changes in how you live this week if you truly receive Christ's righteousness as a gift rather than earning God's favor through your own obedience?
  6. The sermon also speaks of a horizontal dimension of healing: the Spirit removes our heart of stone and gives us a heart of flesh that increasingly resembles God's heart (Ezekiel reference). In practical terms, what does it look like for your heart to be renovated this way in how you treat others?
    Ephesians 4:22-24
    → Where in your relationships right now do you sense the Spirit calling you to let him replace hardness with tenderness, or selfishness with love for your neighbor?
Draft · pending review
Daily readings · Monday–Friday

5-day reading plan

This week we trace the gospel's answer to the corruption of the human heart: from seeing the problem clearly, to understanding Jesus's exchange of righteousness, to receiving the Spirit's renovation of our deepest selves.

Monday Zechariah 3:1-4

Joshua the high priest stands before God in filthy garments, a picture of our condition before Christ. His garments are not merely soiled by external circumstances but represent the defilement that emanates from within. This vision teaches us what Jesus taught the Pharisees: no amount of external religious effort can address the internal corruption we carry into God's presence.

Tuesday 2 Corinthians 5:21

What Zechariah could only depict as a vision, Paul declares as accomplished reality. The exchange is total and forensic: Christ becomes our sin, and we receive his righteousness. This is not self-improvement or moral renovation through human effort—it is the judicial removal of our defilement and the imputation of his perfect standing before the Father.

Wednesday Ezekiel 36:26 (heart of stone)

The Spirit's work in us is not mere moral regulation but radical internal transformation. God does not merely command us to love and serve others—he removes the hard, unresponsive heart and replaces it with a living heart capable of genuine love. This is the renovation that allows us to love God and neighbor, not as external duty but as the overflow of a changed inner life.

Thursday Ephesians 4:22-24

Paul calls us to put off the old self—not to modify it or improve it, but to put it off entirely. The old self is corrupt and deceitful in its desires; it cannot be rehabilitated through external rules. Spiritual blindness happens when we attempt to sanctify the old self rather than putting it off and putting on the new self that is created in the image of God.

Friday Exodus 20:12 (honor father and mother)

The Pharisees had twisted this foundational command into a loophole, declaring money 'Corban' (devoted to God) to escape supporting their aging parents. Jesus exposes how religious language can become a mask for a hard heart. Ask yourself: Where do I use theological reasoning or spiritual busyness to avoid the simpler, costlier work of loving and serving those closest to me?

Draft · pending review
Pray together this week

Father, Remake Our Hearts

Father, we come before you acknowledging what Jesus made plain: the heart of the problem is our heart. We are not defiled by what enters us from outside, but by what flows from within—from hearts corrupted by sin and bent toward self-righteousness. We confess that we, like the Pharisees, have often believed our problem lies elsewhere: in our circumstances, in others' failures, in external pressures. We have used Christian language and religious practice to mask the deepest truth about ourselves—that we are the problem. We have replaced your law of love with our own systems of rules, believing that if we just obey enough, keep enough traditions, avoid enough external mistakes, we will be acceptable to you. Forgive us for this blindness.

But here is the good news that rescues us: Jesus came not to demand more from our filthy hearts but to make a complete exchange. He took our defilement—all of it, all of us—to the cross and gave us his righteousness in its place (2 Corinthians 5:21). The blood he shed purchased what no external ritual, no amount of religious effort, no system of human rules could ever accomplish: he reconciles us vertically to you, Father, and he begins the work of remaking us horizontally for others. By his Spirit, he removes our heart of stone and gives us a heart of flesh—a heart increasingly aligned with your own heart of love for God and neighbor.

We ask you, Father, to deepen our sight this week. Show us where we are still operating on the merit of our own obedience, still trusting in external religious performance, still blaming outward circumstances for what originates in our hearts. Grant us the humility to see ourselves as we truly are, and the faith to receive Jesus' exchange as complete and sufficient. By your Spirit, renovate our hearts from the inside out—soften us toward you, soften us toward those you have called us to love and serve. Make us less like the Pharisees and more like Jesus, whose righteousness now clothes us and whose heart increasingly becomes our own.

To you alone be the glory, Father—for the diagnosis, for the exchange, and for the renovation that is already underway in every heart that belongs to Christ.

Draft · pending review
Sunday-evening family table

What comes out of the heart

For the parent

This card invites your family to notice what Jesus teaches about the heart—not as a squishy, follow-your-feelings organ, but as the source of everything we do and say. The goal is to help kids see that Jesus cares more about what's happening on the inside than about keeping rules on the outside.

Jesus said that what comes out of our mouth comes from our heart. This week, think about one unkind thing you said or did to someone. Where do you think that came from? Was it from anger living in your heart? Jealousy? Fear? And here's the big question: If Jesus can change our hearts, what would change about what comes out of our mouths?
works for ages 7+; younger children may need a parent to help them think about one specific moment, and to rephrase the final question as: 'If Jesus fixes our hearts, what would be different about how we treat people?'
Draft · pending review
Couples · three questions over coffee

Trading Filthy Garments for His Righteousness

  1. What did you hear in this sermon about your own heart that you haven't wanted to see? Where are you tempted to blame external things when Jesus is pointing inward?
  2. In our marriage, where do we replicate the Pharisees' error—using Christian language or practices while operating on a hidden system where we're earning God's favor through our own effort rather than receiving it as a gift?
  3. Jesus offers an exchange: your filthy garment for his righteousness. What would it mean for each of us to stop trying to clean ourselves up and instead receive, together, what he has already purchased for us?
Draft · pending review
Memory verse this week

Mark 7:15

There is nothing outside a person that by going into him can defile him, but the things that come out of a person are what defile him.

Why this verse: This verse is the sermon's structural hinge—it reverses the Pharisees' diagnosis and establishes Jesus' central claim that the heart, not external circumstances or rules, is the source of human defilement. Memorizing it anchors the listener to the gospel's diagnosis: you cannot fix yourself through external religion, but Jesus can trade his righteousness for your filth and renovate your heart by the Spirit.

Draft · pending review
Where this was preached

About the church

Cross of Grace Church
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# Cross of Grace Church

A church preaching expository sermons through the books of the Bible.

## Sermons
- [What 2020 Revealed About Us (Romans 14:7-9, 2021-01-24)](/CoGElPaso/sermons/2021/01/what-2020-revealed-about-us)
- [Where We're At 2021 (2021-01-31)](/CoGElPaso/sermons/2021/01/where-we-re-at-2021)
- [The Ghost on the Sea (Mark 6:45-52, 2021-02-14)](/CoGElPaso/sermons/2021/02/the-ghost-on-the-sea)
- [Heart of Darkness (Mark 7:1-23, 2021-02-21)](/CoGElPaso/sermons/2021/02/heart-of-darkness)

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