http://www.earlychristianwritings.com/marcion.html
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Quote: Marcion is often thought to have first established an explicit canon. Marcion's canon consisted of the Euangelion, or the Gospel of the Lord, and the Apostolikon, ten epistles of Paul, not including the pastorals. There is debate over whether Marcion truncated Luke and Paul or whether later orthodox scribes may have expanded them in some cases.
Marcion receives derogatory references from contemporary apologist Justin Martyr and heresiologist Irenaeus of Lyons. We can reconstruct Marcion's writings through the references in Tertullian's Adversus Marcionem and Epiphanius' Panarion.
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