For example, Christians since the first centuries were required to profess the Apostles Creed. The Creed was not looked at as some lesser authority, or subsidiarity of Scripture. Christ had given Christians an apostolic Church with His authority stamp on it to form a believable and authentic Creed. Likewise the Church would formulate it further with that same authority at her Ecumenical Councils. No group of men merely claiming to be believers of Christ or followers of the Scriptures have any authority to assemble their own Creed. If this is not one of the most arrogant acts of men, to go sit down and rewrite the Creed, then I don't know what is. If we read the Church Fathers, such as Saint Irenaeus for example, it is clear that they viewed the authority of the Church given by the apostles along with the Oral and Written Word of God, as being united in one authority, none being above one or the other, because they are all given by Christ Himself. The greatest fallacy ever created by the pretended "Reformers" of the 16th century was that there be some conflict of authority between the Church and Scripture.
He shall also judge those who give rise to schisms, who are destitute of the love of God, and who look to their own special advantage rather than to the unity of the Church; and who for trifling reasons, or any kind of reason which occurs to them, cut in pieces and divide the great and glorious body of Christ, and so far as in them lies, [positively] destroy it—men who prate of peace while they give rise to war, and do in truth strain out a gnat, but swallow a camel. (Matthew 23:24) For no reformation of so great importance can be effected by them, as will compensate for the mischief arising from their schism. He shall also judge all those who are beyond the pale of the truth, that is, who are outside the Church; but he himself shall be judged by no one. For to him all things are consistent: he has a full faith in one God Almighty, of whom are all things; and in the Son of God, Jesus Christ our Lord, by whom are all things, and in the dispensations connected with Him, by means of which the Son of God became man; and a firm belief in the Spirit of God, who furnishes us with a knowledge of the truth, and has set forth the dispensations of the Father and the Son, in virtue of which He dwells with every generation of men, according to the will of the Father.
True knowledge is [that which consists in] the doctrine of the apostles, and the ancient constitution of the Church throughout all the world, and the distinctive manifestation of the body of Christ according to the successions of the bishops, by which they have handed down that Church which exists in every place, and has come even unto us, being guarded and preserved without any forging of Scriptures, by a very complete system of doctrine, and neither receiving addition nor [suffering] curtailment [in the truths which she believes]; and [it consists in] reading [the word of God] without falsification, and a lawful and diligent exposition in harmony with the Scriptures, both without danger and without blasphemy; and [above all, it consists in] the pre-eminent gift of love, 2 Corinthians 8:1; 1 Corinthians 13 which is more precious than knowledge, more glorious than prophecy, and which excels all the other gifts [of God].
(St. Irenaeus: Against Heresies Book IV, Chapter 33, 7-8)