Every individual? Do you not understand the promise we have been given as believers?
1 Corinthians 2:13 Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
15 But he that is spiritual judgeth all things, yet he himself is judged of no man.
16 For who hath known the mind of the Lord, that he may instruct him? but we have the mind of Christ.
You see. Its not every individual if they are true believers. Its the Holy Spirit who teaches each individual. There is no higher authority than that of the Holy Spirit and He has been given to each of us who are true believers.
I afraid you haven't dealt with the object of discussion. You still have disagreement on the meaning and interpretation of Holy Scripture among those who say they are true believers.
Why should they take your word or your authority over theirs or someone else's?