This article seeks to establish the extent to which Marcion’s Christology influenced the formation of his gospel canon, the Euaggelion. Marcion’s Christology, as seen in statements preserved in Irenaeus, Tertullian and Epiphanius, has features that can be described as both docetic and modalist. These christological beliefs effect Marcion’s redaction of the Pauline epistles and his omission of material from Luke’s Gospel. In particular the omission of the birth narratives and notices relating to the humanity of Jesus suggest the appropriateness of Tertullian’s slogan: ‘the sudden Christ’.