Originally Posted by S.C.Carlson

I'm not sure that a textual solution for this variant (either by conflation or from a primitive text) is the way to go here, especially considering the brevity and popularity of the phrase as a description of Jesus Christ. After all, scribes added son of God to Mark 1:1, and so it seems to me that the same instinct to aggrandize Jesus is at work in Victorinus as well.