We hear a lot at times about the godhead, so that got me wondering: what is the Scriptural basis for the Christian doctrine of Modalism?
The United Pentecostal Church International, who are a denomination of Oneness Pentecostalism, and adopt the doctrine of Oneness, which is essentially the same as Modalistic Monarchianism, offer the following in support of their Doctrinal Foundation:
The umbrella term for the doctrines that include Modalism is Unitarianism.
The scriptural support for Modalism is the same as that for the Trinity, except they interpret the scripture as speaking of God as one person manifest in our dimensions in differing modes. I would argue that the Unitarian interpretation involves ignoring multiple key scriptures that evince three separate persons, such as at Jesus' baptism where the Holy Spirit comes down and the Father speaks:
In Unitarian thinking, therefore there is one person who, in the OT, is revealed as the Father God, and in the New Testament is revealed first as the incarnate Christ, and then, after the ascension, as the Holy Spirit.
They contest the orthodox claim that there are three persons in the Godhead, and claim instead there is one person who, at different times, wears a different "mask", if you will.
Closely related is Patripassionism, which takes Modalism further and says that the Father suffered at the cross (and, presumably so did the Holy Spirit) since each is merely the same person in different guise.
The Trinitarian doctrine, is that God is one in nature and three in persons. Conversely, the Unitarian doctrine is that God is one in nature and in person.
protected by Community♦ Sep 4 '14 at 8:48
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