The Canon of the New Testament is established along with the emergence of the Gnostic heresy. (jan 1, 100 – jan 1, 150)
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Gnostics denied the goodness of the created world and claimed that only a select few can have the knowledge needed for Salvation, St. Irenaeus (ca. 130–200), bishop of Lyons, responded with his Against Heresies, a treatise comprised of five books.
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