When Jesus came, he elevated matrimony to the same status it had originally possessed between Adam and Eve—the status of a sacrament. Thus, any valid marriage between two baptized people is a sacramental marriage and, once consummated, cannot be dissolved. Jesus, therefore, taught that if anyone so married divorces and remarries, that person is living in perpetual adultery, a state of mortal sin.
All pardon for sins ultimately comes from Christ’s finished work on Calvary, but how is this pardon received by individuals? Did Christ leave us any means within the Church to take away sin? The Bible says he gave us two means.
Are all of our sins—past, present, and future—forgiven once and for all when we become Christians? Not according to the Bible or the early Church Fathers. Scripture nowhere states that our future sins are forgiven; instead, it teaches us to pray, "And forgive us our debts, as we also have forgiven our debtors" (Matt. 6:12).
For a sacrament to be valid, three things have to be present: the correct form, the correct matter, and the correct intention. With baptism, the correct intention is to do what the Church does, the correct matter is water, and the correct form is the baptizing "in the name of the Father and of the Son and of the Holy Spirit" (Matt. 28:19).
One key Scripture reference to being "born again" or "regenerated" is John 3:5, where Jesus says, "Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God."
This verse is so important that those who say baptism is just a symbol must deny that Jesus here refers to baptism. "Born again" Christians claim the "water" is the preached word of God.
Few truths are so clearly taught in the New Testament as the doctrine that in baptism God gives us grace. Again and again the sacred writers tell us that it is in baptism that we are saved, buried with Christ, incorporated into his body, washed of our sins, regenerated, cleansed, and so on (see Acts 2:38, 22:16; Rom. 6:1–4; 1 Cor. 6:11, 12:13; Gal. 3:26–27; Eph. 5:25-27; Col. 2:11–12; Titus 3:5; 1 Pet. 3:18–22). They are unanimous in speaking of baptism in invariably efficient terms, as really bringing about a spiritual effect.
Although Latin-rite Catholics are usually baptized by infusion (pouring), they know that immersion (dunking) and sprinkling are also valid ways to baptize. Fundamentalists, however, regard only baptism by immersion as true baptism, concluding that most Catholics are not validly baptized at all.
Although many Protestant traditions baptize babies, Baptists—and "Bible churches" in the Baptist tradition—insist that baptism is only for those who have come to faith. Nowhere in the New Testament, they point out, do we read of infants being baptized.
Fundamentalists often criticize the Catholic Church’s practice of baptizing infants. According to them, baptism is for adults and older children, because it is to be administered only after one has undergone a "born again" experience—that is, after one has "accepted Jesus Christ as his personal Lord and Savior." At the instant of acceptance, when he is "born again," the adult becomes a Christian, and his salvation is assured forever. Baptism follows, though it has no actual salvific value.
~ John Southworth, Venerable, priest, English martyr; tried at the Old Bailey, his response to the accusation of being a Catholic priest, whereupon he was condemned to death and sent to the gallows at Tyburn