Bear Fruits Worthy of Repentance: What Kind of “Change of Mind” Does the New Testament Describe?

The main Greek words involved are μετάνοια (metanoia), “repentance,” and μετανοέω (metanoeō), “to repent.” People often say repentance simply means “to change your mind.” There’s some truth in that statement, but it can be misleading if “change your mind” means nothing more than changing an opinion. The real question isn’t simply whether repentance involves a change of mind. The question is, what kind of change of mind does the New Testament describe as repentance? When we look at how Scripture uses the word, we see that biblical repentance is an inward change about sin and God that changes a person’s purpose and direction. That change then produces conduct that agrees with the new direction.

The Greek lexicons support this understanding. Thayer defines metanoia as “a change of mind,” but he doesn’t stop there when discussing repentance from sin. He describes a person recognizing and rejecting his wrongdoing and determining to enter a better course of life. He also speaks of good deeds as the “tokens and effects” of repentance. Vine says metanoeō means “to change one’s mind or purpose,” but explains that New Testament repentance involves a change for the better. When sin is involved, it includes turning from sin and turning toward God. Mounce also defines metanoia as a “change of mind, repentance,” while describing it as a change in a person’s thinking and feelings that includes “practical reformation.” So, even the lexicons give us good reason not to understand “change of mind” as merely changing an opinion while continuing in the same course.

More importantly, we shouldn’t determine the meaning of repentance by taking the shortest possible dictionary definition and stopping there. We need to look at how Scripture actually uses the word. If Scripture repeatedly connects repentance with turning and changed conduct, then those passages need to shape our understanding of what repentance means.

This becomes very clear in Matthew 3:8, where John the Baptist says, “Therefore bear fruits worthy of repentance.” Notice the distinction. John doesn’t say that the fruit is repentance. The fruit is what repentance produces. The picture of fruit is helpful. Fruit isn’t the same as the root that produces it, but it shows what kind of tree it came from. In the same way, changed behavior isn’t repentance itself, but it’s the expected result of genuine repentance.

Luke’s account makes this even clearer. In Luke 3:8, John tells the people to “bear fruits worthy of repentance.” They respond in verse 10 by asking, “What shall we do then?” If repentance were only a mental change that didn’t require any change in a person’s direction, this would've been the perfect time for John to say, “You don’t need to do anything. You only need to change your mind.” Instead, John tells them to change their behavior. Those who had extra clothing and food were to share with people in need. John tells tax collectors, “Collect no more than what is appointed for you.” Soldiers were told not to intimidate people or falsely accuse them and to be content with their wages. John clearly expected repentance to change how these people lived.

This doesn’t mean that simply changing your behavior is repentance. A person might stop committing a particular sin because he’s afraid of getting caught, because the sin is no longer possible, or because other people are pressuring him to stop. None of those things necessarily means that he has repented. So, it would be wrong to define repentance simply as “stopping sin.” At the same time, it would also be wrong to say someone has repented when he admits his conduct is sinful but fully intends to continue it. Scripture avoids both errors. Repentance begins inwardly, but a genuine inward change affects the direction a person chooses to go.

Consider a simple example. Suppose a man steals someone’s car. Later he says, “I’ve changed my mind. I now believe stealing that car was wrong.” Yet he keeps the car, continues driving it, refuses to return it, and has no intention of ever giving it back. Has he really dealt with what he did simply because his opinion about stealing has changed? Clearly, he hasn’t. If repentance meant nothing more than changing your opinion, he could say, “I’ve repented. I used to think stealing the car was acceptable, but now I think it was wrong.” Meanwhile, he could keep driving the stolen car.

Something is obviously missing from that picture. If the man has truly changed his mind about stealing the car, that change will affect what he intends to do with the car. He now recognizes that it belongs to someone else and that he has no right to keep it. If he can return it, his change of mind will lead him to do so. Returning the car isn’t what creates the change of mind. It’s the action that naturally follows from the change of mind. His conduct shows that his change of mind is real.

The same principle applies to sin. Imagine someone saying, “I’ve changed my mind about this sin. I now believe God condemns it, and I believe I’m wrong for doing it. However, I have no intention of stopping. I plan to continue doing it just as before.” That doesn’t fit the biblical picture of repentance. He may have changed his opinion about whether the action is right or wrong, but he hasn’t changed his purpose behind it. Biblical repentance involves more than admitting, “I was wrong.” It involves a change of heart and purpose that turns a person away from the sinful course.

This doesn’t mean that a person who has repented will never struggle with sin again. Repentance isn’t a promise of sinless perfection. A Christian may stumble, and when he does, he needs to repent again. The difference is one of purpose. The person who has repented no longer intends to continue in the sin, and when he falls, he grieves over it and turns back to God. The person who hasn’t repented has no intention of leaving the sin at all. The question isn’t whether a person ever fails, but which direction he has chosen to go.

Acts 26:20 makes this relationship especially clear. Paul summarizes his preaching by saying that people “should repent, turn to God, and do works befitting repentance.” Notice the progression: repent, turn to God, and do works befitting repentance. Works aren’t the same as repentance because Paul distinguishes them. Still, the works are described as befitting repentance. In other words, they’re the kind of actions that properly go along with repentance.

This is an important distinction. Works of merit don’t earn repentance, forgiveness, or salvation. Paul isn’t saying people must do enough good deeds to prove they're worthy. Instead, he’s saying that genuine repentance produces a response that fits the change that has taken place. The works are the result of repentance, not a substitute for it.

We see the same pattern in Acts 3:19: “Repent therefore and be converted, that your sins may be blotted out.” The word translated “be converted” or “turn again” is ἐπιστρέφω (epistrephō), which carries the idea of turning or returning. Repentance and turning aren’t presented as unrelated ideas. Repentance changes the direction a person chooses to go.

Jesus teaches the same thing in Revelation 2:5 when He tells the church at Ephesus, “Repent and do the first works.” Once again, repentance and works are distinct. The works aren’t repentance itself. Still, Jesus clearly expects repentance to be followed by action. The Ephesians couldn’t properly respond by saying, “Lord, we’ve changed our minds about what we were doing, but we’re going to continue doing exactly the same thing.” Jesus tells them to repent and do.

2 Corinthians 7:9–11 gives us another important part of the picture. Paul says that godly sorrow “produces repentance.” That means sorrow itself isn’t repentance. A person can feel terrible about what he has done without actually repenting. Someone might be sorry because he got caught, because he’s embarrassed, or because his actions caused painful consequences. Feeling bad isn’t necessarily the same as changing one’s mind and purpose concerning the sin.

Paul then describes what happened among the Corinthians. Their response produced diligence, a desire to clear themselves, indignation, fear, strong desire, zeal, and vindication. The passage gives us a helpful progression: godly sorrow produces repentance, and repentance produces a changed response. This is why we shouldn’t confuse remorse with repentance.

Judas is a good example. He felt terrible about betraying Jesus, but feeling terrible alone isn’t biblical repentance. Sorrow can lead to repentance, but sorrow isn’t repentance. A person can deeply regret the consequences of what he has done without truly turning from his sinful course toward God.

Scripture also gives us concrete examples of people whose repentance was followed by a change in conduct. These examples don’t teach that the actions themselves were repentance or that the people earned forgiveness by their works. They show that when people truly changed their hearts and purposes, they no longer continued in exactly the same direction.

Nineveh is one of the clearest Old Testament examples. When Jonah preached that judgment was coming, the people believed God, humbled themselves, and called for a fast. The king commanded everyone to “turn from his evil way and from the violence that is in his hands” (Jonah 3:8). Then the text says, “God saw their works, that they turned from their evil way” (Jonah 3:10). Jesus later said that the people of Nineveh “repented at the preaching of Jonah” (Matthew 12:41). Their turning didn’t create the inward change; it showed that their response to God’s warning was real.

Manasseh gives us another helpful Old Testament example. He had promoted idolatry and led Judah into terrible sin. When he was afflicted, he humbled himself greatly and prayed to God. After God restored him to Jerusalem, Manasseh removed the foreign gods and the idol from the Lord’s house, repaired the altar of the Lord, offered sacrifices, and commanded Judah to serve the Lord (2 Chronicles 33:10–16). His changed actions agreed with his humbled heart and his new direction toward God.

Jesus’ parable of the lost son gives a clear New Testament picture of the same principle. Jesus tells this series of parables in the setting of joy over a sinner who repents (Luke 15:7, 10). The son “came to himself,” recognized his sin, arose, returned to his father, and confessed what he had done (Luke 15:17–21). His return didn’t earn his father’s compassion. Rather, getting up and going home showed that his inward change had given him a new direction.

Zacchaeus also illustrates how a changed heart produces changed conduct. After receiving Jesus, he announced that he would give half of his possessions to the poor and repay fourfold anyone he had defrauded. Jesus responded, “Today salvation has come to this house” (Luke 19:8–9). The passage doesn’t say that restitution purchased salvation. It shows that Zacchaeus was no longer determined to continue profiting from the wrongdoing he now recognized.

The converts at Ephesus provide another New Testament example. Those who had practiced magic confessed what they had done and publicly burned the books connected with their former practices, even though the books were very valuable (Acts 19:18–20). They didn’t merely say that their old practices were wrong while keeping everything ready to return to them. Their conduct showed a decisive break with their former course.

So, when someone says, “Repentance means changing your mind,” we shouldn’t necessarily say that's false. Instead, we should ask what the person means by “changing your mind.” If he means that repentance begins with an inward change in how a person thinks about sin and God, that’s true. If he means that repentance is nothing more than changing an opinion while intending to continue in the same sinful course, that doesn’t fit how Scripture describes repentance.

A fuller definition would be: Biblical repentance is a change of mind and purpose concerning sin and God that causes a person to turn from sin toward God and produces conduct consistent with that new direction.

This definition keeps the biblical distinctions clear. Repentance isn’t merely sorrow because godly sorrow produces repentance. Repentance isn’t simply doing good works because Scripture speaks of works that are befitting repentance. Repentance also isn’t merely changing outward behavior because a person can change his behavior for the wrong reasons. At the same time, repentance isn’t merely admitting that something is wrong while deciding to continue doing it anyway.

The point can be stated simply: the change of mind is the root, the change of purpose sets the direction, turning toward God is the movement, and changed conduct is the fruit. That fits John’s command perfectly: “Bear fruits worthy of repentance.” When the people asked John what that meant, he didn’t tell them merely to think differently. He showed them how a genuinely changed mind should affect the way they lived. Biblical repentance begins in the mind, but it doesn’t end there.