Six Books of Instructions for Baptismal Candidates

The "Six Books of Instructions for Baptismal Candidates" (Competentibus ad baptismum instructionis libelli sex) is a theological work by Nicetas of Remesiana, a bishop and theologian who lived in the 5th century. His missionary work and writings were instrumental in the Christianization of the barbarians in the lower Danube valley.1

This catechetical series, particularly sections on faith, the Holy Spirit, and the Nicene Creed, emphasizes orthodox Trinitarian doctrine, opposing Arian and Macedonian views. Nicetas's work is also notable for introducing the term "communion of saints," referring to the spiritual bond uniting the living and the dead. He is also credited with promoting Latin sacred music for worship and may have composed the hymn "Te Deum laudamus".1