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This study explores Marcion's ideas through his writings and the writings of early Christian polemicists who shaped the idea of heresy.

Originally presented as the author's thesis (Ph. D.)--University of Edinburgh, 2009.

An investigation into the motives behind writing the canonical versions of Luke and Acts Building on recent scholarship that argues for a second-century date for the book of Acts, Marcion and Luke-Acts explores the probable context for the authorship not only of Acts but also of the canonical Gospel of Luke. Noted New Testament scholar Joseph B. Tyson proposes that both Acts and the final version of the Gospel of Luke were published at the time when Marcion of Pontus was beginning to proclaim his version of the Christian gospel, in the years 120-125 c.e. He suggests that although the author was subject to various influences, a prominent motivation was the need to provide the church with writings that would serve in its fight against Marcionite Christianity. Tyson positions the controversy with Marcion as a defining struggle over the very meaning of the Christian message and the author of Luke-Acts as a major participant in that contest. Suggesting that the primary emphases in Acts are best understood as responses to the Marcionite challenge, Tyson looks particularly at the portrait of Paul as a devoted Pharisaic Jew. He contends that this portrayal appears to have been formed by the author to counter the Marcionite understanding of Paul as rejecting both the Torah and the God of Israel. Tyson also points to stories that involve Peter and the Jerusalem apostles in Acts as arguments against the Marcionite claim that Paul was the only true apostle. Tyson concludes that the author of Acts made use of an earlier version of the Gospel of Luke and produced canonical Luke by adding, among other things, birth accounts and postresurrection narratives of Jesus.

There is a lot of talk about heresy these days. The frequency and volume of accusations suggest that some Christians have lost a sense of the gravity of the word. On the other hand, many believers have little to no familiarity with orthodox doctrine or the historic distortions of it. What’s needed is a strong dose of humility and restraint, and also a clear and informed definition of orthodoxy and heresy. Know the Heretics provides an accessible “travel guide” to the most significant heresies throughout Christian history. As a part of the KNOW series, it is designed for personal study or classroom use, but also for small groups and Sunday schools wanting to more deeply understand the foundations of the faith. Each chapter covers a key statement of faith and includes a discussion of its historical context; a simple explanation of the unorthodox teaching, the orthodox response and a key defender; reflections of contemporary relevance; and discussion questions.