How many times in Presbyterian Church did we recite the Apostles' Creed, as if it was an important document to say what our faith was? If you say that a document rightly evaluates our faith, and then you use that document in addition to the Bible to judge faith questions, then you are using it as an "authority", meaning a document that you respect or give credence to, in order to judge other teachings.
Actually, you are attacking the doctrine of "solo Scriptura", not "sola Scriptura". We hold other authorities and resources, such as creeds, confessions, and theological books written by Christians, by they are all SUBSERVIENT to Scripture, which is the ultimate authority.
Creeds like the Apostles' Creed are not "additional" authorities, we hold to them because they are summaries of what SCRIPTURE teaches. And Scripture is our ULTIMATE authority, and only infallible authority.
Sola Scriptura is a term used by Luther, the Lutheran Church, and their Formula of Concord as I quoted explicitly to teach that only the "Bible alone" is the only rule and authority on religious "doctrines" / teachings,
Actually, Luther didn't invent the concept of "sola Scriptura".
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We have learned from none others the plan of our salvation, than from those through whom the gospel has come down to us, which they did at one time proclaim in public, and,at a later period, by the will of God,
handed down to us in the Scriptures, to be the ground and pillar of our faith.”
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Irenaeus, Against Heresies, 3:1:1 (AD 180)
“But those who are ready to toil in the most excellent pursuits,
will not desist from the search after truth, till they get the demonstration from the Scriptures themselves.”
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Clement of Alexandria (AD 180)
“But there is no evidence of this, because Scripture says nothing.” [...] “The Scripture says nothing of this, although it is not in other instances silent” [...] “I
do not admit what you advance of your own apart from Scripture.”
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Tertullian, The Flesh of Christ, Ch. 6, Ch. 7 (AD 200)
“There is, brethren, one God, the knowledge of who me we gain from the Holy Scriptures, and from no other source. For just as a man, if he wishes to be skilled in the wisdom of this world, will find himself unable to get at it in any other way than by mastering the dogmas of philosophers,
so all of us who wish to practice piety will be unable to learn its practice from any other quarter than the oracles of God.
Whatever things, then, the Holy Scriptures declare, at these let us look; and whatsoever things they teach, these let us learn.”
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Hippolytus, Against Noetus, Ch. 9 (AD 200)
“Let nothing be innovated, says he, nothing maintained, except what has been handed down. Whence is that tradition?
Whether does it descend from the authority of the Lord and of the Gospel, or does it come from the commands and the epistles of the apostles? For that those things which are written must be done.”
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Cyprian, Epistle 73:2 (AD 250)
“...
the sacred and inspired Scriptures are sufficient to declare the truth.”
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Athanasius, Against the Heathen, 1:1:3 (AD 325)
“Now one might write at great length concerning these things, if one desired to go rate details respecting them; for the impiety and perverseness of heresies will appear to be manifold and various, and the craft of the deceivers to be very terrible.
But since Holy Scripture is of all things most sufficient for us, therefore recommending to those who desire to know more of these matters, read the Divine word, [...]”
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Athanasius, To the Bishops of Egypt, Ch. 1, 4 (AD 325)
“For concerning the divine and holy mysteries of the Faith, not even a casual statement must be delivered without the Holy Scriptures, nor must we be drawn aside by mere plausibility and artifacts of speech.
Even to me, who tell thee these things, give not absolute credence, unless thou receive the proof of the things which I announce from the Divine Scriptures. For this salvation which we believe depends
not on ingenious reasoning, but on demonstration of the Holy Scriptures.”
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Cyril of Jerusalem, Catechetical Lectures, 4,17 (AD 360)
“I do not consider it fair that the custom which obtains among them should be regarded as a law and rule of orthodoxy. If custom is to be taken in proof of what is right, then it is certainly competent for me to put forward on my side the custom which obtains here. If they reject this, we are clearly not bound to follow them.
Therefore let God-inspired Scripture decide between us; and on whichever side be found doctrines in harmony with the word of God, in favour of that side will be cast the vote of truth.”
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Basil, Letter 189, 3 (AD 370)
“But while the latter proceeded, on the subject of the soul, as far in the direction of supposed consequences as the thinker pleased, we are not entitled to such license, I mean that of affirming what we please;
we make the Holy Scriptures the rule and measure of every tenet; we necessarily fix our eyes upon that, and approve that alone which may be made to harmonize with the intention of those writings.”
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Gregory of Nyssa, On the Soul and Resurrection (AD 375)
"Regarding the things I say, I should supply even the proofs, so I will not seem to rely on my own opinions, but rather,
prove them with Scripture, so that the matter will remain certain and steadfast."
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John Chrysostom, Homily 8 On Repentance and the Church, p. 118, vol. 96 TFOTC.
“Men of the world give many further rules about the way to speak, which I think we may pass over; as, for instance, the way jesting should be conducted. For though at times jests may be proper and pleasant, yet they are unsuited to the clerical life.
For how can we adopt those things which we do not find in the holy Scriptures?”
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Ambrose, On the Duties of the Clergy, 1.23.102 (397)
“For how is it not absurd that in respect to money, indeed, we do not trust to others, but refer this to figures and calculation; but in calculating upon facts we are lightly drawn aside by the notions of others; and that too, though we possess an exact balance, and square and rule for all things, the declaration of the divine laws?
Wherefore I exhort and entreat you all, disregard what this man and that man thinks about these things, and inquire from the Scriptures all these things;”
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John Chrysostom, Homily 13 (AD 405)
“Whereas, therefore, in every question, which relates to life and conduct, not only teaching, but exhortation also is necessary; in order that by teaching we may know what is to be done, and by exhortation may be incited not to think it irksome to do what we already know is to be done;
what more can I teach you, than we we read in the Apostle? For holy Scripture setteth a rule to our teaching, that we dare not ‘be wise more than it behoveth to be wise’; but be wise, as himself saith, ‘unto soberness, according as unto each God hath allotted the measure of faith.’ “
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Augustine, On the Good of Widowhood (AD 425)