In Spirit & In Truth: The Catechism of The Holy Church of Twelve Tribes Apostolic Kingdom is a mandatory manual for Christian education within the bounds of this Orthodox-Pentecostal Catholic Christian Church. Created for all ages and designed to touch on the basic yet raw and theological essentials of Trinitarian Christian doctrine, this catechism was authorized and designed to both aide our Christian educators in discipleship and the very beginning process of "theosis" and help prepare the new believer by being a teaching tool.