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Defilement from Within

Renewing Your Mind / R.C. Sproul
The Truth Network Radio
November 8, 2026 12:01 am

Defilement from Within

Renewing Your Mind / R.C. Sproul

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November 8, 2026 12:01 am

We cannot conquer sin merely by altering our behavior. The root of our depravity lies in our hearts. From his sermon series in the gospel of Mark, today R.C. Sproul presents a grim diagnosis of our sinfulness and reveals the true cure. Save 30% on Keith Mathison's new book from Ligonier, From Age to Age, plus other titles by Dr. Mathison. Use discount code RYM30 at checkout: https://www.renewingyourmind.org/store Receive R.C. Sproul's ebook commentary on the gospel of Mark with your donation: https://gift.renewingyourmind.org/   Meet Today's Teacher:   R.C. Sproul (1939–2017) was founder of Ligonier Ministries, first minister of preaching and teaching at Saint Andrew's Chapel, first president of Reformation Bible College, and executive editor of Tabletalk magazine. Renewing Your Mind is a donor-supported outreach of Ligonier Ministries. Explore all of our podcasts: https://www.ligonier.org/podcasts

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In his book *From Age to Age*, Dr. Keith Matheson traces out God's plan for the end times from Genesis to Revelation. Go to renewingyourmind.org/store to add this title to your library today, and use RYM30 to save 30% at checkout. You can also use RYM30 to save on other works from Dr. Matheson at liganiere.org when you order before November 10th.

For our listeners outside of the U.S. and Canada, you can use our WM30 to save on the digital editions of Dr. Matheson's book and other resources. We still have this idea that sin is something on the edge, tangential, peripheral to our existence. Jesus says no; that the fallment comes from the very core of your being.

It doesn't come from your hands. Comes from your heart. Have you noticed that the term sin seems to be used with less frequency today? And even where sin is acknowledged, it's often presented as an occasional slip-up or a mistake. Certainly not something that reflects who we fundamentally are in our hearts as fallen creatures, but Scripture's assessment of our sinful humanity is far more grave.

And unless we first come to terms with the Bible's diagnosis of our spiritual problem, then we will never find relief in the remedy of the gospel. Hi, this is Josh Mann, and you're listening to this Lord's Day edition of Renewing Your Mind. Today we'll be continuing our brief series in Mark's gospel with R.C. Sproul. Here he is now with a message entitled "Defilement from Within." And he said to them, "All too well you reject the commandment of God that you may keep your tradition.

For Moses said, 'Honor your father and your mother,' and he who curses father or mother." Let him be put to death. But you say, if a man says to his father or mother, whatever profit you might have received from me, is corban, that is a gift to God, then you no longer let him do anything for his father or his mother, making the word of God of no effect through your tradition. Which you have handed down, and many such things you do. And when he had called all the multitude to himself, he said to them, "Hear me, everyone, and understand. There is nothing that enters a man from outside which can defile him, but the things which come out of him; those are the things that defile a man." If anyone has ears to hear, let him hear.

Now, when he had entered a house away from the crowd, his disciples asked him concerning the parable, and so he said to them, "Are you thus without understanding? Also, do you not perceive that whatever enters a man from outside cannot defile him, because it does not enter his heart?" But his stomach, and is eliminated, thus purifying all foods. And he said, "It's what comes out of a man that defiles a man, for from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, thefts, covetousness, wickedness, deceit, lewdness, an evil eye." Blasphemy, pride, foolishness—all these evil things come from within and defile a man. What the conflict was about here was about one form of legalism.

Now we hear that word "legalism" bandied about sometimes quite loosely in the Christian community. And it can be confusing because there is more than one type of legalism, by which the truth of God's word is distorted. In fact, there are several types, and I'm not going to go into all of them today. But I just want to mention three, perhaps the three most common kinds of legalism that we encounter. The first is perhaps the most devastating.

That is that legalism by which we believe that we can be justified in the presence of God by doing the works of the law. That's called legalism because it undermines the way of salvation that God declares so plainly in Scripture that we are justified by faith and by faith alone. And that the only righteousness that can possibly avail for us is an alien righteousness, not our own. It is the righteousness of Jesus. And if you are trusting in any other righteousness than the righteousness of Jesus, then you have been caught in the snare of that type of legalism.

The second type of legalism is the one we addressed the last time in this chapter, where The traditions of men bind God's people where God has left them free. It is adding to the law of God things that God does not command or forbid, and we've already, as I said, examined that. The third most frequent form of legalism that we encounter is the one that is in view in the text that I just read before you. It's what I call loopholeism. The legalist is the Philadelphia lawyer who looks at the law of God and tries to discern a way to get around it.

He'll try somehow. To adhere to the letter of the law, but trample underfoot the whole point and spirit of the law. We remember, for example, the prohibitions in Israel about limiting one's travel on the Sabbath to what was called a Sabbath day journey, which was a very short distance, and how the rabbis got around that was that they would have merchants during the week. Put one of their toothbrushes under a rock so far from their home, and then under another rock, the same distance away, with another toothbrush, because the rabbinic law allowed the establishing of residency by putting some article that you owned into a piece of real estate.

So the Jews got around the law by putting toothbrushes along the road, and they could go from domicile to domicile until they reached the destination that they desired. Clearly, loopholeism. Clearly, an attempt to get around the law of God.

Well, the rabbis were past masters of this kind of casgistry. And we see it in this encounter that Jesus has with them on this occasion, with respect to the Old Testament principle of korban. Korban had to do with the giving of gifts or the setting aside of private property or one's personal wealth to the devotion to God, which was a good principle. But it was so twisted and distorted by the rabbis that they used the principle of Korban as a loophole to get around one of the most important laws of God—that commandment that required people to honor their father and their mother. Let's listen to this exchange that goes on here between Jesus.

And the leaders, Jesus says to them, "All too well, you reject the commandment of God, that you may keep your tradition." Notice that Jesus doesn't say the problem with you is that you keep the law and the tradition. Rather, he said you get around the law, and reject the law of God. And replace the law of God with your tradition, and in fact, what you're doing is using your tradition as an excuse to keep from obeying the law of God. And he makes specific reference here to the fifth commandment, for Moses said, "Honor your father and your mother." And he who curses father or mother, let him be put to death. But you say, notice the contrast here.

Moses says, and Moses is the spokesperson for God. Moses is delivering divine revelation. These religious experts are delivering their opinions, which fall far short of divine revelation. The Pharisees and the rabbis were not agents of divine revelation, but Moses was, and so Jesus says, "Moses said this, but you say that." Now, what is it that they say? You say, "If a man says to his father or mother, 'Whatever profit you might have received from me is corban,' that is a gift to God." Then you no longer let him do anything for his father, or his mother, making the word of God of no effect through your tradition, which you have handed down, and many such things you do.

Now, what's going on here? The Jews developed a sense of deferred giving. Where a promise was made by one of the persons that upon their death they would bestow all of their worldly goods to the church or to the work of God in this case to the tabernacle or the temple, and that meant that during their lifetime they would not have to use their personal wealth. For anything else, because it had already been committed to God, and so in the name of piety, a person could escape their obligation of caring for their parents in times of infirmity, or in their old age when they may have been too fragile to support themselves.

Well, I'm sorry, Mom. I'm sorry, Dad. I'd like to help you out, but my finances are Corbin. They're all committed to the Lord, and I can't take the Lord's money and give it to you.

Now, of course, what they could do is that they were allowed to spend as much of their own money on themselves as they wanted to during their lifetime.

So the vow of Corbin did not prohibit the individual from spending all the money they wanted to on themselves until they die. They just couldn't spend it on anybody else.

So here is a tradition that emerges that tries to sanctify a way to get out from under the responsibility that God puts upon His people. To give honor to their parents. Again, be careful. There was a legitimate place for Corbin in the Bible, but a righteous interpretation of this principle could never be used to cancel out another principle set forth by God.

Now, herein. Is a lesson for us. There is a science in theology, and in biblical studies that we call the science of hermeneutics. You've heard of hermeneutics. Hermeneutics is a plumber in a popgun.

No, hermeneutics is the science of biblical interpretation. It teaches objective principles and rules that govern our treatment of the text, lest we turn the Bible into a wax nose shaped and formed for our own desires, which is what the Pharisees did. And at the heart of the theological principle of hermeneutics in Reformed theology is the law that is called the analogia fidei. Or the law of faith, which says this quite simply: that no portion of Scripture must ever be set against another portion of Scripture. What's the assumption here?

The assumption is is that all of the Scripture is the Word of God. The second assumption is that God does not speak with a forked tongue. That what God reveals in His truth is always coherent; it is consistent.

Now we've been told that consistency is the hobgoblin of little minds, and if that adage is true, then we have to say that the tiniest mind to be found is the mind of God. But rather, consistency is a sign of clarity, of truth. And God's word is consistent with itself, and we ought not willy-nilly to set one portion of Scripture against another. We saw that happen in the temptation of Jesus in the wilderness. Remember that, when Satan, trying to seduce Jesus, quotes Scripture to him, and says, "Jesus, doesn't the Bible say that?" The Lord will give His angels charge over you, lest you dash your foot against the stone.

And if that's true, why don't you jump off the pinnacle of the temple and wait for the angels to catch you? You see the nature of the temptation. Satan takes the scripture and says, "Let's see if the scripture is true." And what Jesus says, Satan, I hear your idea. But you're guilty of violating the analogy of faith. You're operating with a poor hermeneutic here.

You're setting scripture against scripture. The Bible also says that thou shalt not tempt or put to the test the Lord your God. And so, if I'm going to be obedient to that, I can't acquiesce to your suggestion. Jesus would not allow the word of God to be broken. By any human suggestion or addition, and so that's what's in view here: that these people, with their traditions, had done all kinds of contortions to get out from under the clear manifestation of the truth of God.

And Jesus said, "You make the word of God of no effect through your tradition." The biggest theological controversy that ever took place in church history took place in the 16th century, and on the surface it seemed as if the whole controversy raged over one doctrine, and that was the doctrine of justification by faith alone, the gospel itself. And when Luther was brought into disputes. With the princes of the church, they reminded Martin Luther that his understanding of justification was not the understanding of the tradition of the church. That Holy Mother Church had explained justification in different categories from what Luther said. But Luther said, "Well, wait a minute.

Here's what the Bible says." My conscience is held captive by the word of God. I've got to submit to that, not to your traditions. And so, behind the scenes, the secondary issue was the question of authority: where does the authority lie? Is it in the Scripture alone, or is it in the Scripture and tradition? And does the tradition really trump everything else?

Because the tradition gives the binding interpretation of Scripture.

So, for all practical purposes, it's not only that you have two sources, Scripture and tradition, but you really have one tradition, which becomes more important than the word itself. I really don't how understand how any sentient creature could read the New Testament teaching, particularly in Paul's letter to the Romans, about justification, and draw from that anything that resembles the Roman Catholic doctrine, which is based upon tradition. But again, it's not just Roman Catholics that fall prey to this problem; we all do. We all begin to trust our traditions, and give them more weight than the actual weight of Scripture. But we believe that the final arbiter on all theological and moral debate must be the Word of God, dear friends, and that's what this debate is all about between Jesus and his contemporaries.

You make the Word of God of no effect. By your traditions, that's the judgment.

So easy for us to look at that from two thousand years distance and say, "Shame on those Pharisees! Shame on the rabbis! Shame on the medieval theologians of Rome!" Aren't we glad that we never do that? This is a temptation to believers in every age, in every Christian community, to put our love lines to our own traditions, and give them more exalted authority than the teaching of Scripture itself, whereby we make the Word of God of no effect. Is there anything more diabolical than that?

Than to make God's word of no effect. Jesus says that this activity that they do with the Corbin is not an isolated instance, but He completes this rebuke by saying, "Many such things you do." In other words, he's saying to the religious leaders of day, "You guys do this all the time. You go out of your way to minimize the import of God's word and its binding character on your lives." Then he says. He called the multitude himself, and he said, "Hear me, everyone!" Now, let me just comment quickly on that. When Jesus says, "Hear me, listen, everybody," he's calling them to attention to hear an authoritative pronouncement.

Jesus, as it were, is now giving an oracle from God, and listen to what he says. There's nothing that enters a man from outside that can defile him, but the things which come out of him, those are the things that defile a man. If anyone has ears to hear, let him hear. Listen, he says. It's not what you eat.

It's not what you drink. It's nothing from the outside that goes into you that defiles you or contaminates you. He goes on to say, whatever you ingest goes to your stomach, and then is eliminated. What God is concerned about here is not your stomach or your hands. But your heart, because that's where defilement arises in the very core of your being.

We need to understand this because we all admit that we're sinners. Oh, to err is human; to forgive is divine. Nobody's perfect. We say that, but we still have this idea that sin is something on the edge, tangential, peripheral to our existence. Jesus says, "No." That the filthiness comes from the very core of your being.

Sin arises not from the stomach. It doesn't come from your hands. Comes from your heart, from the very center of your being. Remember what the Old Testament says about that. As a man thinketh in his heart.

So is he. As a man thinks in his heart, so is he. Strange, isn't it? Because we usually think of the organ of thought being the brain, but the Bible doesn't say, "As a man thinks in his mind, so is he." Because we have all kinds of thoughts and conflicting thoughts in our minds, but what we really believe. Is that which drives our behavior.

We may have ideas that go in our ears and out the other side, and we entertain them for a while in our thinking. But it's that which pierces the heart that drives how we live. As a man thinks in his heart, as a man thinks at the very core of his existence, so is he. And Jesus says, "There's where defilement happens." And then he concludes this discussion by giving a catalog of all kinds of sins. I'll just read it for you quickly.

The disciples didn't get it either, and he said, "Don't you understand? Whatever enters a man from the outside can't defile him." And he said, "What comes out of a man? That's what defiles him. Out of the heart comes this evil thoughts." Adulteries, fornications, murders, thefts, covetousness, wickedness, deceit, lewdness, the evil eye, blasphemy, pride, foolishness, foolishness—right up there with adultery, deceitfulness. All of these things come from the heart, and the only way we overcome them.

It's when the heart is cleansed. Scripture tells us that our hearts are deceitful and desperately sick, but the gospel says that change is possible. Through the person and work of Jesus Christ, we've been rescued from the penalty our sins deserve. We're being delivered from the power that sin has over us, and one day in eternity, we'll be freed from the presence of sin altogether. What a glorious day that will be!

Thank you for joining us today for this Sunday edition of Renewing Your Mind, the daily Bible teaching podcast from Liganiere Ministries. If you've been encouraged by today's message, consider making a donation to support this ministry. Your financial gift can help people all around the world to grow in their knowledge of God and His holiness. When you give, you'll receive the digital download of Dr. Sproul's commentary on Mark.

You can go to renewingyourmind.org today to make your donation. When a Gentile woman sought healing for her daughter, she went to Jesus. Join us next week as R.C. Sproul considers how her humble faith was met with great mercy from the Lord. Here on Renewing Your Mind.

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