What is modalism?
Modalism (also called Sabellianism or Modalistic Monarchianism) teaches that God is one Person who reveals himself in different modes or roles. It strictly affirms one God but completely denies three distinct Persons. A Modalist believes the Father, Son, and Holy Spirit are the exact same Person, only wearing different masks. According to this ancient heresy, the Father, Son, and Spirit are not three co-existing divine Persons, but a single God with no threeness, only oneness. In contrast, Trinitarianism says God eternally co-exists as three Persons of one nature. Modalism holds that God is a single being who sometimes appears as the Father, the Son, or the Spirit. The big distinction here is that Modalism rejects three Persons. In Modalism, there’s one God, one essence, one Person. These three manifestations of God are not co-eternal or co-existing. According to Modalism, God reveals Himself in the Old Testament as the Father. God in the Old Testament does not reveal himself as the So...