Original sentence: About the middle of the second century (140-155) he traveled to Rome, where he joined the Syrian Gnostic, Cerdo.Marcion's canon rejected the entire Old Testament, along with all other epistles and gospels of what would become the 27-book New Testament canon, which during his life had yet to be compiled.Marcion's canon, possibly the first Christian canon ever compiled, consisted of eleven books: a gospel consisting of ten sections drawn from the Gospel of Luke; and ten Pauline epistles.Marcionism was denounced by its opponents as heresy and written against, notably by Tertullian in a five-book treatise Adversus Marcionem (Against Marcion) in about 208.Paul's epistles enjoy a prominent position in the Marcionite canon, since Paul was considered by Marcion to be Christ's only true apostle
Edited sentence: " while other scholars have rejected that categorization.He betook himself, about the middle of the second century, to Rome (140–155), which originated none of the Gnostic systems, but attracted them all.He rejected the heathen mythology of Gnostics, and adhered to Christianity as the only true religion; he was less speculative, and gave a higher place to faith.He represents "anti Old Testament" and pseudo-Pauline tendency.Marcion anticipated a rationalistic opposition to the Old Testament and to the Pastoral Epistles.Marcion's canon consisted of eleven books: a gospel consisting of ten sections drawn from the Gospel of Luke; and ten Pauline epistles.Marcion's canon rejected the entire Old Testament, along with all other epistles and gospels of the 27-book New Testament canon.Marcionism was denounced by its opponents as heresy, and written against, notably by Tertullian in a five-book treatise Adversus Marcionem, written about 208.Paul's epistles enjoy a prominent position in the Marcionite canon, since Paul is credited with correctly transmitting the gracious universality of Jesus' message in opposition to the harsh dictates of the "just god".There he joined the Syrian Gnostic, Cerdo