Lutherans hold that Baptism is a saving work of God, mandated and instituted by Jesus Christ. Baptism is a "means of grace" through which God creates and strengthens "saving faith" as the "washing of regeneration" in which infants and adults are reborn. Since the creation of faith is exclusively God's work, it does not depend on the actions of the one baptized, whether infant or adult. Even though baptized infants cannot articulate that faith, Lutherans believe that it is present all the same.
Because it is faith alone that receives these divine gifts, Lutherans confess that baptism "works forgiveness of sins, delivers from death and the devil, and gives eternal salvation to all who believe this, as the words and promises of God declare." Holding fast to the Scripture cited in 1 Peter 3:21 "and this water symbolizes baptism that now saves you also—not the removal of dirt from the body but the pledge of a good conscience toward God. It saves you by the resurrection of Jesus Christ." Therefore, Lutherans administer Baptism to both infants and adults. In the special section on infant baptism in his Large Catechism, Luther argues that infant baptism is God-pleasing because persons so baptized were reborn and sanctified by the Holy Spirit.