Against Marcion

In his battle against against Marcion, Tertullian wrote his longest work, the five books of Adversus Marcionem, with a purpose to refute Marcion’s teachings and those of his disciples. (Dowley 112; Decret, 34-35).

Note: The link to the Adversus Marcionem (https://www.tertullian.org/works/adversus_marcionem.htm) by Tertullian Project has the complete five books translated (links on the top).

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Decret, Smither, François and Edward (2011). Early Christianity in North Africa. Cambridge: James Clarke & Co. pp. 34–35. ISBN 978-0-227-17356-5.

Dowley, Tim (1995). Introduction to the History of Christianity. Minneapolis: Fortress Press. p. 112. ISBN 978-0-8006-2935-9.