When we “handle right the word of truth” (2 Timothy 2:15), we see that the thief was not subject to the New Testament command of immersion because this command was not given until after the thief’s death. It was not until Christ was resurrected that He said, “He who believes and is baptized will be saved” (Mark 16:16). It was not until Christ’s death that the Old Testament ceased, signified by the tearing of the Temple curtain (Matthew 27:51). When Jesus died, He took away the Old Testament, “nailing it to the cross” (Colossians 2:14).
The word “testament” means “covenant” or “will.” The last will and testament of Christ is the New Testament, which consists of those teachings that apply to people after the death of Christ. If we expect to receive the benefits of the New Testament (salvation, forgiveness of sin, eternal life), we must submit to the terms of the will for which Christ is mediator (Hebrews 9:15), for “where a testament is, there must also of necessity be the death of the testator; for a testament is of force after men are dead; otherwise it is of no strength at all while the testator lives” (Hebrews 9:16-17).
So prior to the Lord’s death and the sealing of the New Testament, the baptism for the forgiveness of sins that would be in effect after the crucifixion was not a requirement for those who sought to be acceptable to God. Indeed, while Jesus was on Earth in person, He exercised His authority to forgive sin (Matthew 9:6). People now, however, live during the Christian era of religious history. Prior to Christ’s death, there were no Christians (Acts 11:26). For a person to reject water baptism as a prerequisite to salvation on the basis of what the thief did or did not do, is comparable to Abraham seeking salvation by building an ark—because that’s what Noah did to please God. It would be like the rich young ruler (Matthew 19) refusing Christ’s directive to sell all his possessions—because wealthy King David did not have to sell his possessions in order to please God.
The thief on the cross could not have been baptized the way the new covenant stipulates you and I must be baptized. Why? Romans 6:3-4 teaches that if we wish to acquire “newness of life,” we must be baptized into Christ’s death, be buried with Christ in baptism, and then be raised from the dead. There was no way for the thief to comply with this New Testament baptism—Christ had not died! Christ had not been buried! Christ had not been raised! In fact, none of God’s ordained teachings pertaining to salvation in Christ (2 Timothy 2:10), and in His body the Church (Acts 2:47; Ephesians 1:22-23), had been given. The church, which Christ’s shed blood purchased (Acts 20:28), had not been established, and was not set up until weeks later (Acts 2).
We must not look to the thief as an example of salvation. Instead, we must obey “from the heart that form of doctrine” (Romans 6:17)—the form of Christ’s death, burial, and resurrection through baptism by faith (Romans 6:3-4). Only then can we be “made free from sin to become the servants of righteousness as citizens of His kingdom.” (Romans 6:18).