2Ti 3:15
And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus.
2Ti 3:16
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All scripture is given by inspiration of God, and isprofitable for doctrine, for reproof, for correction, for instruction in righteousness:
2Ti 3:17
That the man of God may be perfect, throughly furnished unto all good works.
Rev 22:18
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For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
Rev 22:19
And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book.
does this present an answer?
Yes it presents "don't add FAKE RULES that are not written out in scripture".
Show us the verse for this FAKE RULE that says Scripture is the ONLY AUTHORITY.
I invite you folks to look up the word PROFITABLE in a dictionary.......IT would be PROFITABLE if you understood its meaning.
It is also PROFITABLE to have good reading glasses when you read things.
It is profitable to have a nuclear generator to power one's house. But its not required.