Baptism is a true sacrament instituted by Christ. It is administered by washing with natural water and at the same time invoking the Most Holy Trinity. Anybody, even an unbeliever or a heretic can validly administer baptism. Since it confers grace by the signs' being properly carried out children can and should be baptized even while still infants. Baptism is necessary for salvation. Baptism effects the remission of original sin and actual sins and of all punishment due to sin; it confers sanctifying grace, membership in Christ and in the Church and the obligation to obey the Church's laws, and give an indelible character.