baptism cleans away all the dirt of sin. [...] de Jesus limpa toda a sujeira do pecado. Jesus Christ washed away sin all at one time by being [...] baptized at the Jordan and through this gave salvation to all those who believe in this truth.
At Baptism we are "cleansed" of original sin (the fact that we are born without original holiness and justice), but Baptism doesn't take away the tendency towards sin. It only restores our ability to have access to holiness and justice.
Where does the Bible say baptism washes away sins?
Consider Acts 22:16, where Ananias tells Paul, “Rise and be baptized, and wash away your sins, calling on his name.” Notice what Ananias doesn't say, “Rise and be baptized, because you've been forgiven your sins.” Clearly, baptism precedes the removal of sin and is ordered to bringing about such an effect.
(2 Corinthians 5:21; Hebrews 4:15; Hebrews 7:26; 9:28; 1 John 3:5) The Bible shows clearly that it is the blood of Jesus Christ that cleanses one from sin, not baptism.
Baptism takes away original sin, all personal sins and all punishment due to sin. It makes the baptized person a participant in the divine life of the Trinity through sanctifying grace, the grace of justification which incorporates one into Christ and into his Church.
So yes, we do sin even though we have been made righteous through Christ's blood. But we have this certain hope that one day when we stand before God he will see us perfect. All possible because of what God has done, not something we have earned which therefore could be lost.
Lutherans believe and teach that baptism forgives the guilt of original sin, but the sinful nature that remains is real sin. As you noted, the sinful nature is part of us throughout this earthly life and continually wars with the new self (Romans 7:7-25).
* Baptism takes away both the eternal punishment of hell due to unforgiven mortal sin, and the temporal punishment on earth or in purgatory due to venial sin or to forgive mortal sin.
The apostle Peter points out that the water of the flood “symbolizes baptism that now saves you,” and makes it clear that the water used in baptism does not provide the MEANS of our salvation. Rather, God's grace through faith in Jesus Christ alone saves us (Eph. 2:8-9).
The Catholic Church teaches this use of holy water and making a sign of the cross when entering a church reflects a renewal of baptism, a cleansing of venial sin, as well as providing protection against evil.
Does getting baptized mean your sins are forgiven?
Peter replied, “Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit. For the promise is for you and for your children and for all who are far off, everyone whom the Lord our God calls to himself” (Acts 2:38-39).
Without full, sincere repentance before God, you are not saved. You can be saved by God without baptism. Do you remember the thief on the cross beside Jesus? He was saved the day he died without any possibility of being baptized.
Jesus came into this world for the purpose of seeking and saving sinners (Luke 19:10). God's plan of salvation through Jesus included His death on the cross where He shed His precious blood. It is His blood that washes away sin (Revelation 1:5b).
Where in the Bible does it say baptism washing away sins?
9:17-18; 1 Corinthians 12:13: both associate the Holy Spirit with baptism) Acts 22:16 “And now why do you wait? Rise and be baptized, and wash away your sins, calling on his name.” (cf. 9:17-18)
Baptism removes original sin, the sin that was brought into the world when Adam and Eve disobeyed God in the Garden of Eden. Baptism allows a person to follow the example of Jesus. It is necessary for a person to be baptised before they can receive the other sacraments.
They believe that Jesus took our sins when he was baptized by John the Baptist because there was no reason for Jesus to be baptized. Jesus wasn't being washed of any sins so that was him taking on our sins.
Does the Bible say baptism washes away original sin?
Indeed, the waters of Baptism do wash away Original Sin (and, in the case of adults, all personal sins). But the ritual barely mentions Original Sin; instead, it stresses our union with Christ throughout this life and eternity.
According to St. Augustine of Hippo, original sin is lust. The baptism is supposed to wash away the sin of lust until the child voluntarily becomes confirmed, after which the sin of lust has to be periodically absolved by the magic power of confession, wielded by priests.
We are born in a state of original sin. 2. Through baptism we are “born again” and made new creatures in Christ; through baptism our sins are forgiven.
Concupiscence or inclination to sin: baptism erases original sin but the inclination to sin remains. The absence of sanctifying grace in the new-born child is also an effect of the first sin, for Adam, having received holiness and justice from God, lost it not only for himself but also for humanity.
Baptism doesn't clean anyone of their sins. We have confession to deal with what comes after baptism. Baptism forgives past sin. Future sins are forgiven though, repentance, confession and absolution.
Summary A baptized member of the church can repent and receive a forgiveness of individual sins. They can also receive the gift of the Holy Ghost (1 Nephi 10:17).
Since repentance is necessary before baptism, then I would encourage such a person to first repent and then be properly baptized. However, even when the commitment to fight against sin is made and you join with the Lord in baptism, it does not mean the struggle with sin ends.
Some churches do not use the Trinitarian formula and therefore their baptisms are not valid and one would need to baptized again. It is not a sin to be baptized twice, but one need not be baptized twice in most cases.