How so? The Bible says that whatever is not of faith is sin. You must make judgment calls all the time based on your personal interpretation of that the Bible says. If it does not conform to the Bible (as seen through your personal creed), then it is sin. And you are forced to act on those interpretations. Does not your personal creed become an authority for you?
Sure. It is a personal creed. But, it is not looked at in the same way Scripture is looked at.
But you act on it, therefore it has authority to you. It may not to anyone else, but it does to you.
Not in the sense Scripture is an authority.
Scripture is right whether I believe it or not.
I may believe something and be wrong.
Scripture is never wrong. It is the Ultimate Authority by which all else is judged, including personal belief. NOTHING is its equal short of the living Word of God. Nothing should be held to anywhere near that standard. The question should never be “do you believe what this creed says” but do you believe what Scripture says. A creed can organize those thoughts, but beyond that it is of little value. It has no real authority on its own. Anything authoritative it says MUST derive that authority by coming from the Word of God.