“Nor does the scripture itself say it is sufficient.”
Of course it does. 2 Tim. 3:16, “All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
17 That the man of God may be perfect, throughly furnished unto all good works.”
2 Tim. 2:15, “Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.”
Heb. 4:12-13, “For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart. Neither is there any creature that is not manifest in his sight: but all things are naked and opened unto the eyes of him with whom we have to do.”
Nowhere does the scriptures give that status to tradition or to the church. Ps. 138:2, “I will worship toward thy holy temple, and praise thy name for thy lovingkindness and for thy truth: for thou hast magnified thy word above all thy name.”
Good point.
However, the grammer police might disagree.
In 2 Timothy the scripture is called profitable, that is, somethig needed in addition to something else. The man of God then becomes perfect as he completes his formation by the study of the scripture. Therefore is says the opposite: that the scripture is a necessary but not sufficient component of faith formation.
2 Tim 2:15 simply urges people to study.
In Heb 4, no claim of sufficency is made.
We all agree that the scripture has a unique role in faith formation and in settling arguments.