On the other hand, Irenaeus took it for granted that the apostolic tradition had also been deposited in written documents. As he says, “what the apostles at first proclaimed by word of mouth, they afterwards by God’s will conveyed to us in Scriptures.” (p. 37-38)
Did Irenaeus then subordinate Scripture to unwritten tradition?…. his real defense of orthodoxy was founded on Scripture. Indeed, tradition itself, on his view, was confirmed by Scripture, which was “the foundation and pillar of our faith.” Secondly, Irenaeus admittedly suggested that a firm grasp of “the canon of truth” received at baptism would prevent a man from distorting the sense of Scripture. But this “canon,” so far from being something distinct from Scripture, was simply a condensation of the message contained in it. … The whole point of his teaching was, in fact, that Scripture and the Church’s unwritten tradition are identical in content, both being vehicles of the revelation. (p. 38-39)
[Tertullian] was emphatic that no secret tradition existed, and that it was incredible that the apostles did not know, or failed to pass on, the revelation in its entirety. (p. 40)
Like Irenaeus, Tertullian is convinced that Scripture is consonant in all its parts, and that its meaning should be clear if it is read as a whole. But where controversy with heretics breaks out, the right interpretation can be found only where the true Christian faith and discipline have been maintained, i.e. in the Church. The heretics, he complained, were able to make Scripture say what they liked because they disregarded the regula. (p. 40)
It was the Bible, declared Clement of Alexandria about A.D. 200, which as interpreted by the Church, was the source of Christian teaching. His greater disciple Origen was a thorough-going Biblicist who appealed again and again to Scripture as the decisive criterion of dogma. The Church drew her catechetical material, he stated, from the prophets, the gospels and the apostles’ writings; her faith, he suggested, was buttressed by Holy Scripture supported by common sense. “The holy and inspired Scriptures,” wrote Athanasius a century later, “are fully sufficient for the proclamation of the truth”; while his contemporary, Cyril of Jerusalem, laid it down that “with regard to the divine and saving mysteries of faith no doctrine, however trivial, may be taught without the backing of the divine Scriptures…. For our saving faith derives its force, not from capricious reasonings, but from what may be proved out of the Bible.” Later in the same century John Chrysostom bade his congregation seek no other teacher that the oracles of God; everything was straightforward and clear in the Bible, and the sum of necessary knowledge could be extracted from it. In the West Augustine declared that “in the plain teaching of Scripture we find all that concerns our belief and moral conduct”; while a little later Vincent of Lerins (d. c. 450) took it as an axiom the Scriptural canon was “sufficient, and more than sufficient, for all purposes.” (p. 42-43)
Further, it was everywhere taken for granted that, for any doctrine to win acceptance, it had first to establish its Scriptural basis. (p. 46)
J.N.D Kelly, "Early Christian Doctrines"
Did Irenaeus then subordinate Scripture to unwritten tradition?…. his real defense of orthodoxy was founded on Scripture. Indeed, tradition itself, on his view, was confirmed by Scripture, which was “the foundation and pillar of our faith.” Secondly, Irenaeus admittedly suggested that a firm grasp of “the canon of truth” received at baptism would prevent a man from distorting the sense of Scripture. But this “canon,” so far from being something distinct from Scripture, was simply a condensation of the message contained in it. … The whole point of his teaching was, in fact, that Scripture and the Church’s unwritten tradition are identical in content, both being vehicles of the revelation. (p. 38-39)
[Tertullian] was emphatic that no secret tradition existed, and that it was incredible that the apostles did not know, or failed to pass on, the revelation in its entirety. (p. 40)
Like Irenaeus, Tertullian is convinced that Scripture is consonant in all its parts, and that its meaning should be clear if it is read as a whole. But where controversy with heretics breaks out, the right interpretation can be found only where the true Christian faith and discipline have been maintained, i.e. in the Church. The heretics, he complained, were able to make Scripture say what they liked because they disregarded the regula. (p. 40)
It was the Bible, declared Clement of Alexandria about A.D. 200, which as interpreted by the Church, was the source of Christian teaching. His greater disciple Origen was a thorough-going Biblicist who appealed again and again to Scripture as the decisive criterion of dogma. The Church drew her catechetical material, he stated, from the prophets, the gospels and the apostles’ writings; her faith, he suggested, was buttressed by Holy Scripture supported by common sense. “The holy and inspired Scriptures,” wrote Athanasius a century later, “are fully sufficient for the proclamation of the truth”; while his contemporary, Cyril of Jerusalem, laid it down that “with regard to the divine and saving mysteries of faith no doctrine, however trivial, may be taught without the backing of the divine Scriptures…. For our saving faith derives its force, not from capricious reasonings, but from what may be proved out of the Bible.” Later in the same century John Chrysostom bade his congregation seek no other teacher that the oracles of God; everything was straightforward and clear in the Bible, and the sum of necessary knowledge could be extracted from it. In the West Augustine declared that “in the plain teaching of Scripture we find all that concerns our belief and moral conduct”; while a little later Vincent of Lerins (d. c. 450) took it as an axiom the Scriptural canon was “sufficient, and more than sufficient, for all purposes.” (p. 42-43)
Further, it was everywhere taken for granted that, for any doctrine to win acceptance, it had first to establish its Scriptural basis. (p. 46)
J.N.D Kelly, "Early Christian Doctrines"