CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 1227–1231

1227 According to the Apostle Paul, the believer enters through Baptism into communion with Christ's death, is buried with him, and rises with him:

Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, so that as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life.

The baptized have "put on Christ." Through the Holy Spirit, Baptism is a bath that purifies, justifies, and sanctifies.

1228 Hence Baptism is a bath of water in which the "imperishable seed" of the Word of God produces its life-giving effect. St. Augustine says of Baptism: "The word is brought to the material element, and it becomes a sacrament."
1229 From the time of the apostles, becoming a Christian has been accomplished by a journey and initiation in several stages. This journey can be covered rapidly or slowly, but certain essential elements will always have to be present: proclamation of the Word, acceptance of the Gospel entailing conversion, profession of faith, Baptism itself, the outpouring of the Holy Spirit, and admission to Eucharistic communion.
1230 This initiation has varied greatly through the centuries according to circumstances. In the first centuries of the Church, Christian initiation saw considerable development. A long period of catechumenate included a series of preparatory rites, which were liturgical landmarks along the path of catechumenal preparation and culminated in the celebration of the sacraments of Christian initiation.
1231 Where infant Baptism has become the form in which this sacrament is usually celebrated, it has become a single act encapsulating the preparatory stages of Christian initiation in a very abridged way. By its very nature infant Baptism requires a post-baptismal catechumenate. Not only is there a need for instruction after Baptism, but also for the necessary flowering of baptismal grace in personal growth. The catechism has its proper place here.