Marcion of Sinope was an important figure in early Christianity. His theology rejected the deity described in the Hebrew Scriptures and in distinction affirmed the Father of Christ as the true God. The Church Fathers denounced Marcion, and he was excommunicated from the proto-orthodox Church
According to Marcion, the god of the Old Testament, whom he called the Demiurge, the creator of the material universe, is a jealous tribal deity of the Jews, whose law represents legalistic reciprocal justice and who punishes mankind for its sins through suffering and death. Contrastingly, the god that Jesus professed is an altogether different being, a universal god of compassion and love who looks upon humanity with benevolence and mercy. Marcion also produced his Antitheses contrasting the Demiurge of the Old Testament with the Heavenly Father of the New Testament.
Marcion held Jesus to be the son of the Heavenly Father but understood the incarnation in a docetic manner, i.e. that Jesus’ body was only an imitation of a material body, and consequently denied Jesus’ physical and bodily birth, death, and resurrection.