Baptism (from the Greek noun βάπτισμα baptisma; see below) is a Christian rite of admission and adoption, with the use of water, into Christianity.
It may be performed by immersing in water completely. The synoptic gospels recount that John the Baptist baptized Jesus. Baptism is considered a sacrament in most churches, and as an ordinance in others.
Baptism is also called christening,
Martyrdom was identified early in Church history as “baptism by blood”, enabling the salvation of martyrs who had not been baptized by water. Later, the Catholic Church identified a baptism of desire, by which those preparing for baptism who die before actually receiving the sacrament are considered saved. Some Christians have regarded baptism as necessary for salvation, though others, such as Huldrych Zwingli (apparently a false teacher, and influenced much of the modern church with his false teaching (1484–1531), denied its necessity.
Quakers and the Salvation Army do not practice water baptism at all. Among denominations that practice water baptism, differences occur in the manner and mode of baptizing and in the understanding of the significance of the rite. Most Christians baptize “in the name of the Father, and of the Son, and of the Holy Spirit” (following the Great Commission), but some baptize in Jesus’ name only. Much more than half of all Christians baptize infants; many others regard only believer’s baptism as true baptism, which is the correct understanding due to the fact an infant can’t be a believer, or aware of its sin, nor be able to understand the purpose of baptism, nor has the ability to confess and repent sins which comes before Baptism.
You will see a number of articles and sermons concerning the truth of baptism, and as usual, comes from scripture only… any teaching that cannot be verified by the bible, and taught as “biblical”, are the doctrines of men and thereby a false doctrine… we are saved by the cross only, and the truth is found only in scripture.