Just a little info in case anyone wants to know what Roman Catholics believe about infant baptism:
From the Catechism of the Catholic Church:
The Baptism of infants
1250 Born with a fallen human nature and tainted by original sin, children also have need of the new birth in Baptism to be freed from the power of darkness and brought into the realm of the freedom of the children of God, to which all men are called.
The sheer gratuitousness of the grace of salvation is particularly manifest in infant Baptism. The Church and the parents would deny a child the priceless grace of becoming a child of God were they not to confer Baptism shortly after birth.
1251 Christian parents will recognize that this practice also accords with their role as nurturers of the life that God has entrusted to them.
1252 The practice of infant Baptism is an immemorial tradition of the Church. There is explicit testimony to this practice from the second century on, and it is quite possible that, from the beginning of the apostolic preaching, when whole "households" received baptism, infants may also have been baptized
1260"Since Christ died for all, and since all men are in fact called to one and the same destiny, which is divine, we must hold that the Holy Spirit offers to all the possibility of being made partakers, in a way known to God, of the Paschal mystery."63 Every man who is ignorant of the Gospel of Christ and of his Church, but seeks the truth and does the will of God in accordance with his understanding of it, can be saved. It may be supposed that such persons would have desired Baptism explicitly if they had known its necessity.
1261 As regards children who have died without Baptism, the Church can only entrust them to the mercy of God, as she does in her funeral rites for them. Indeed, the great mercy of God who desires that all men should be saved, and Jesus' tenderness toward children which caused him to say: "Let the children come to me, do not hinder them,"64 allow us to hope that there is a way of salvation for children who have died without Baptism. All the more urgent is the Church's call not to prevent little children coming to Christ through the gift of holy Baptism.
From Scripture:
Gen. 17:12, Lev. 12:3 - these texts show the circumcision of eight-day old babies as the way of entering into the Old Covenant - Col 2:11-12 - however, baptism is the new "circumcision" for all people of the New Covenant. Therefore, baptism is for babies as well as adults. God did not make His new Covenant narrower than the old Covenant. To the contrary, He made it wider, for both Jews and Gentiles, infants and adults.
Job 14:1-4 - man that is born of woman is full of trouble and unclean. Baptism is required for all human beings because of our sinful human nature.
Psalm 51:5 - we are conceived in the iniquity of sin. This shows the necessity of baptism from conception.
Matt. 18:2-5 - Jesus says unless we become like children, we cannot enter into heaven. So why would children be excluded from baptism?
Matt 19:14 - Jesus clearly says the kingdom of heaven also belongs to children. There is no age limit on entering the kingdom, and no age limit for being eligible for baptism.
Mark 10:14 - Jesus says to let the children come to Him for the kingdom of God also belongs to them. Jesus says nothing about being too young to come into the kingdom of God.
Mark 16:16 - Jesus says to the crowd, "He who believes and is baptized will be saved." But in reference to the same people, Jesus immediately follows with "He who does not believe will be condemned." This demonstrates that one can be baptized and still not be a believer. This disproves the Protestant argument that one must be a believer to be baptized. There is nothing in the Bible about a "believer's baptism."
Luke 18:15 – Jesus says, “Let the children come to me.” The people brought infants to Jesus that he might touch them. This demonstrates that the receipt of grace is not dependent upon the age of reason.
Acts 2:38 - Peter says to the multitude, "Repent and be baptized.." Protestants use this verse to prove one must be a believer (not an infant) to be baptized. But the Greek translation literally says, "If you repent, then each one who is a part of you and yours must each be baptized” (“Metanoesate kai bapistheto hekastos hymon.”
This, contrary to what Protestants argue, actually proves that babies are baptized based on their parents’ faith. This is confirmed in the next verse.
Acts 2:39 - Peter then says baptism is specifically given to children as well as adults. “Those far off” refers to those who were at their “homes” (primarily infants and children). God's covenant family includes children. The word "children" that Peter used comes from the Greek word "teknon" which also includes infants.
Luke 1:59 - this proves that "teknon" includes infants. Here, John as a "teknon" (infant) was circumcised. See also Acts 21:21 which uses “teknon” for eight-day old babies. So baptism is for infants as well as adults.
Acts 10:47-48 - Peter baptized the entire house of Cornelius, which generally included infants and young children. There is not one word in Scripture about baptism being limited to adults.
Acts 16:15 - Paul baptized Lydia and her entire household. The word "household" comes from the Greek word "oikos" which is a household that includes infants and children.
Acts 16:15 - further, Paul baptizes the household based on Lydia's faith, not the faith of the members of the household. This demonstrates that parents can present their children for baptism based on the parents' faith, not the children's faith.
Acts 16:30-33 - it was only the adults who were candidates for baptism that had to profess a belief in Jesus. This is consistent with the Church's practice of instructing catechumens before baptism. But this verse does not support a "believer's baptism" requirement for everyone. See Acts 16:15,33. The earlier one comes to baptism, the better. For those who come to baptism as adults, the Church has always required them to profess their belief in Christ. For babies who come to baptism, the Church has always required the parents to profess the belief in Christ on behalf of the baby. But there is nothing in the Scriptures about a requirement for ALL baptism candidates to profess their own belief in Christ (because the Church has baptized babies for 2,000 years).
Acts 16:33 - Paul baptized the jailer (an adult) and his entire household (which had to include children). Baptism is never limited to adults and those of the age of reason. See also Luke 19:9; John 4:53; Acts 11:14; 1 Cor. 1:16; and 1 Tim. 3:12; Gen. 31:41; 36:6; 41:51; Joshua 24:15; 2 Sam. 7:11, 1 Chron. 10:6 which shows “oikos” generally includes children.
Rom. 5:12 - sin came through Adam and death through sin. Babies' souls are affected by Adam's sin and need baptism just like adult souls.
Rom. 5:15 - the grace of Jesus Christ surpasses that of the Old Covenant. So children can also enter the new Covenant in baptism. From a Jewish perspective, it would have been unthinkable to exclude infants and children from God's Covenant kingdom.
1 Cor. 1:16 - Paul baptized the household ("oikos") of Stephanus. Baptism is not limited to adults.
Eph. 1:1; Col. 1:2 - Paul addresses the "saints" of the Church, and these include the children he addresses in Eph. 6:1 and Col. 3:20. Children become saints of the Church only through baptism.
Eph. 2:3 - we are all by nature children of wrath, in sin, like all mankind. Infants are no exception. See also Psalm 51:5 and Job 14:1-4 which teach us we are conceived in sin and born unclean.
2 Thess. 3:10 - if anyone does not work let him not eat. But this implies that those who are unable to work should still be able to eat. Babies should not starve because they are unable to work, and should also not be denied baptism because they are unable to make a declaration of faith.
Matt. 9:2; Mark 2:3-5 - the faith of those who brought in the paralytic cured the paralytic's sins. This is an example of the forgiveness of sins based on another's faith, just like infant baptism. The infant child is forgiven of sin based on the parents' faith.
Matt. 8:5-13 - the servant is healed based upon the centurion's faith. This is another example of healing based on another's faith. If Jesus can heal us based on someone else’s faith, then He can baptize us based on someone else’s faith as well.
Mark 9:22-25 - Jesus exercises the child's unclean spirit based on the father's faith. This healing is again based on another's faith.
1 Cor. 7:14 – Paul says that children are sanctified by God through the belief of only one of their parents.
Exodus 12:24-28 - the Passover was based on the parent's faith. If they did not kill and eat the lamb, their first-born child died. Joshua 5:2-7 - God punished Israel because the people had not circumcised their children. This was based on the parent's faith. The parents play a critical role in their child's salvation.
A few sites that might help:
Infant Baptism
Early Teachings of Infant Baptism (Fathers
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www.scripturecatholic.com