God Who Is Communion: Unmasking Modalism

In AD 213, the early Christian writer Tertullian warned that defending God's unity by erasing His internal distinctions ultimately loses both the Father and the Son. That warning strikes at the heart of modalism—an ancient teaching that reduces the Father, Son, and Holy Spirit to mere roles or masks worn by a solitary God. Though rooted in the second century, this error persists today in movements such as Oneness Pentecostalism.This book traces modalism from its origins with figures like Noetus and Sabellius to its refutation by early defenders such as Tertullian and Hippolytus. It explores the Jewish background of "e;two powers in heaven,"e; examines the baptismal formula of the Didache, and considers key Gospel passages—showing that the early church's faith was not a late invention but the recognition of a God who is eternally Father, Son, and Holy Spirit.Written as a first work by Samuel Emilio Castillo, a theology student from Venezuela, this concise volume offers a clear introduction to one of history's most consequential theological debates.