I first heard of this idea many years ago, but not much was said about it until the last few years. Some men have always done what they wanted to do, regardless of what the Lord said. Any practice that transgresses God's word and involves a lot of people will somehow be "justified" by those who want to continue in it. A complicated research program will begin amassing "evidence" to prove that the Bible does not mean what it obviously teaches. Thus, justification is found to do that which God's word does not allow.

The Nature of Marriage
"Marriage is honorable in all, and the bed undefiled" (Hebrews 13:4). In the beginning God instituted marriage and regulated it by his word. He did not plan for marriage to be dissolved except by death. Marriage is a physical, fleshly union; it is not a spiritual union. They are no more twain but one flesh (Matthew 19:6). Death ends all marriages (Romans 7:3). Baptism has nothing to do with our marriage, but it is essential to our spiritual bond in Christ.
Adultery and fornication are sinful just as lying, stealing, murder and idolatry are sinful. These sins are equally applicable to those in Christ and those in the world. Jesus taught that divorce and remarriage results in committing adultery. If a man puts away his wife for fornication, she is guilty of sin (adultery). If he puts her away for any other cause and marries another, he commits adultery; and he causes her to commit adultery. Any man who marries that one who is put away, commits adultery, and there is no exception clause (Mattew. 5:32; 19:9; Mark 10:11, 12; Luke 16:18). Any twist or perversion of Scripture that contradicts, modifies or invalidates these plain statements of Jesus is false doctrine.
Now some are teaching that baptism "washes" away all previous unlawful marriages, and the one with whom he/she is married at the time of baptism is the scriptural spouse for the rest of their lives. There is no way that can be true.

What Is Baptism?
The New Testament teaches that baptism is a condition for the forgiveness of sins. Peter and the other apostles told the multitude of people on Pentecost to "repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins" (Acts 2:38). Ananias said to Saul, "And now why tarriest thou? Arise, and be baptized, and wash away thy sins, calling on the name of the Lord" (Acts 22:16). The only thing that baptism "washes" away is the past sins of the penitent believer!  Baptism does not provide for forgiveness of future sins - sins not yet committed.
Baptism does not change any human relationship on earth. It changes man's relationship to God. We are baptized into Christ (Galatians 3:27); into the one body, which is the church (1 Corinthians 12:13; Ephesians 1:22,23). Baptism saves us (1 Peter 3:21). In baptism we are made free from sin, and become servants of righteousness (Romans 6:16,17).
All deeds, words and thoughts that are sinful before baptism, are equally sinful after baptism.  If a man and woman should engage in sexual sin before baptism, that same act is as sinful as after baptism.  One who engages in prostitution cannot continue in that sinful conduct after baptism. He/she cannot continue the practice of any sin (Romans 6:1-18). In like manner, one who puts away his/her spouse for any cause other than fornication, and marries another, commits adultery; and whosoever marries the put away one commits adultery.  Now, if that is an adulterous relation-ship before baptism, it is an adulterous relationship after baptism.

Faith Is Essential to Scriptural Baptism
The gospel is the power of God unto salvation to the Jew and Greek (Romans 1:16). The gospel is addressed to all nations alike, "For all have sinned, and come short of the glory of God" (Romans 3:23). That means that all men are amenable to the law of Christ, which is the gospel. Hearing the gospel produces faith, which is essential to be baptized (Romans 10:17).

Repentance Is Essential to Scriptural Baptism
Repentance is a command of God for all men, Jew and Gentile alike (Acts 17:30). One must repent before he can be baptized (Acts 2:38; Luke 24:47). All men must repent or perish (2 Peter 3:9). Godly sorrow for sin leads to repentance (2 Corinthians 7: 10). The knowledge of the goodness of God leads to repentance (Romans 2:4). The judgment of God causes men to repent (Acts 17:30,31; 2 Cor. 5:10).
Repentance is a function of the will that resolves to abandon all sin and diligently pursue the will of God. It begins with a knowledge of sin and the conviction that one is a sinner. It is a sincere regret for sin; a resolution to stop sinning now - a reformation of life and a restoration of all things possible to righteous conduct before God.
True repentance does not ask what price is to be paid; there is no desire to save face; no self-justification. The worth and value of past deeds and present standing are worthless. His sins become loathsome and repulsive. He is willing to do anything God requires of him, no matter how painful. Only God's word will produce true repentance.
A man and woman who are in an unlawful marriage must repent before they can be baptized. What will repentance require of them before they can be scripturally baptized? They must cease the sinning, which means to dissolve the adulterous marriage. Their sin is adultery. John the Baptist told Herod, who had married his brother Phillip's wife, "It is not lawful for thee to have thy brother's wife" (Mark 6:17, 18).
Some argue that "adultery" in Matthew 19:9 is the act of marrying and does not refer to sexual sins. That is not so! Jesus said if a man "looks" on a woman to lust after her, he has committed adultery already with her in his heart (Matthew 5:28). That is not marriage; it is the act of sexual sin in the heart with the spouse of another.
If baptism washes away unlawful marriages, and makes them right, what about the man who is married to two wives at the same time, may he keep both of his wives after he has been baptized? If not, why not? Which one should he keep, since he had both when he was "baptized"? Does repentance demand that he put away one wife? If unlawful marriages are made right by baptism, why would not the homosexuals who "marry" each other be made right by baptism so that they could continue to live together? Would you baptize two homosexuals who intended to continue living together? The further down this road one goes, the more unbelievable it becomes. Baptism will not wash away polygamy and homosexual “marriages.” It is no wonder that the advocates of this unholy doctrine claim that aliens are not amenable to the law of Christ. If the alien is not amenable to the law of Christ, he is not a sinner. Where there is no law, there is no transgression (Romans 4:15). Sin is the transgression of the law (1 John 3:4). If he is not under the law of Christ, he does not sin and does not need baptism, and there is no need to talk about what his baptism will wash away. Marriage is not a function of the church, and baptism does nothing to marriage.
Baptism does not wash away wives or husbands.
Does Baptism Wash Away Past
Unlawful Marriages?
By H.E. Phillips
Page 6
Page 7
Miscellaneous
Home