Oneness Pentecostalism

====The dual nature of Christ====
{{Main|Hypostatic union}}
When discussing the [[Incarnation (Christianity)|Incarnation]], Oneness theologians and authors often refer to a concept known as the dual nature of Christ, which is understood as the union of human and divine natures in the man Jesus. Bernard describes this concept in his book ''The Oneness of God'', stating that Jesus "is both Spirit and flesh, God and man, Father and Son. On his human side He is the Son of man; on his divine side He is the Son of God and is the Father dwelling in the flesh."<ref>{{cite book |first1=David |last1=Bernard |url=http://ourworld.compuserve.com/homepages/pentecostal/One-Top.htm |archive-url=https://web.archive.org/web/20080216034825/http://ourworld.compuserve.com/homepages/pentecostal/One-Top.htm |archive-date=February 16, 2008 |title=The Oneness of God  |chapter=Jesus is God |publisher=Word Aflame Press |year=1993 |isbn=978-0-912315-12-6 |pages=69–70}}</ref> They see this not as two persons in one body but rather as two natures united in one person: Jesus Christ.<ref>{{cite web |last1=Dulle |first1=Jason |title=The Dual Nature of Christ |url=https://www.onenesspentecostal.com/dualnature.htm |website=Institute for Biblical Studies |access-date=6 November 2021 |quote=...Jesus' natures never worked independent of one another. His two natures exist "without confusion, without change, without division, without separation; the difference of the natures having been in no wise taken away by reason of the union, but rather the properties of each being preserved...."}}</ref> Oneness believers see the mystery referred to in [[1 Timothy 3:16]] as referencing this concept of two natures being united in the one person of Jesus Christ.<ref>{{cite book |first1=David |last1=Bernard |url=http://ourworld.compuserve.com/homepages/pentecostal/One-Top.htm |archive-url=https://web.archive.org/web/20080216034825/http://ourworld.compuserve.com/homepages/pentecostal/One-Top.htm |archive-date=February 16, 2008 |title=The Oneness of God |publisher=Word Aflame Press |year=1993 |isbn=978-0-912315-12-6 |pages=63–64 |chapter=Jesus is God}}</ref>

Although the Oneness belief in the union of the divine and human into one person in Christ is similar to the [[Chalcedonian]] formula, Chalcedonians disagree sharply with them over their opposition to Trinitarian dogma. Chalcedonians see Jesus Christ as a single person uniting God the Son—the eternal second person of the Trinity—with human nature. Oneness believers, on the other hand, see Jesus as one single person uniting the one God himself with human nature as the Son of God.