3), Irenaeus says this is “the firm and true preaching of the church, according to which the one and same way of salvation is shown in the whole world.… For the church everywhere preaches the truth” (Against Heresies 5.20.1).3 In his Demonstration of the Apostolic Preaching he summarized the contents as “the preaching of the truth” (Demonstration 98). Clement of Alexandria identified the rule with the “tradition of the blessed teaching from the apostles” (Miscellanies 1.1.15.2). Tertullian argued
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