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Many understand the term repentance to mean “a turning from sin.” Regretting sin and turning from it is related to repentance, but it is not the precise meaning of the word. In the Bible, the word repent means “to change one’s mind.” The Bible also tells us that true repentance will result in a change of actions (Luke 3:8–14; Acts 3:19). In summarizing his ministry, Paul declares, “I preached that they should repent and turn to God and demonstrate their repentance by their deeds” (Acts 26:20). The full biblical definition of repentance is a change of mind that results in a change of action.

What, then, is the connection between repentance and salvation? The book of Acts especially focuses on repentance in regard to salvation (Acts 2:38; 3:19; 11:18; 17:30; 20:21; 26:20). To repent, in relation to salvation, is to change your mind regarding sin and Jesus Christ. In Peter’s sermon on the day of Pentecost (Acts chapter 2), he concludes with a call for the people to repent (Acts 2:38). Repent from what? Peter is calling the people who rejected Jesus (Acts 2:36) to change their minds about that sin and to change their minds about Christ Himself, recognizing that He is indeed “Lord and Christ” (Acts 2:36). Peter is calling the people to change their minds, to abhor their past rejection of Christ, and to embrace faith in Him as both Messiah and Savior.

Repentance involves recognizing that you have thought wrongly in the past and determining to think rightly in the future. The repentant person has “second thoughts” about the mindset he formerly embraced. There is a change of disposition and a new way of thinking about God, about sin, about holiness, and about doing God’s will. True repentance is prompted by “godly sorrow,” and it “leads to salvation” (2 Corinthians 7:10).

Repentance and faith can be understood as two sides of the same coin. It is impossible to place your faith in Jesus Christ as the Savior without first changing your mind about your sin and about who Jesus is and what He has done. Whether it is repentance from willful rejection or repentance from ignorance or disinterest, it is a change of mind. Biblical repentance, in relation to salvation, is changing your mind from rejection of Christ to faith in Christ.

Repentance is not a work we do to earn salvation. No one can repent and come to God unless God pulls that person to Himself (John 6:44). Repentance is something God gives—it is only possible because of His grace (Acts 5:31; 11:18). No one can repent unless God grants repentance. All of salvation, including repentance and faith, is a result of God drawing us, opening our eyes, and changing our hearts. God’s longsuffering leads us to repentance (2 Peter 3:9), as does His kindness (Romans 2:4).

While repentance is not a work that earns salvation, repentance unto salvation does result in works. It is impossible to truly change your mind without that causing a change in action. In the Bible, repentance results in a change in behavior. That is why John the Baptist called people to “produce fruit in keeping with repentance” (Matthew 3:8). A person who has truly repented of his sin and exercised faith in Christ will give evidence of a changed life (2 Corinthians 5:17; Galatians 5:19–23; James 2:14–26).

To see what repentance looks like in real life, all we need to do is turn to the story of Zacchaeus. Here was a man who cheated and stole and lived lavishly on his ill-gotten gains—until he met Jesus. At that point he had a radical change of mind: “Look, Lord!” said Zacchaeus. “Here and now I give half of my possessions to the poor, and if I have cheated anybody out of anything, I will pay back four times the amount” (Luke 19:8). Jesus happily proclaimed that salvation had come to Zacchaeus’s house, and that even the tax collector was now “a son of Abraham” (verse 9)—a reference to Zacchaeus’s faith. The cheat became a philanthropist; the thief made restitution. That’s repentance, coupled with faith in Christ.

Repentance, properly defined, is necessary for salvation. Biblical repentance is changing your mind about your sin—no longer is sin something to toy with; it is something to be forsaken as we “flee from the coming wrath” (Matthew 3:7). It is also changing your mind about Jesus Christ—no longer is He to be mocked, discounted, or ignored; He is the Savior to be clung to; He is the Lord to be worshiped and adored.