“Your premise is invalid, since it is self-contradictory. The idea that the only valid Christian doctrines must be contained in Scripture, isn’t found in Scripture. It is a novelty invented by Luther.”
Who mentioned Luther. If you cannot substantiate your Christian doctrine on Holy Scriptures then your position is untenable and as reliable as that of the Pharisees’ mixture of written Law and man-made oral laws, which Jesus rebuked. As we see Paul instruct Timothy:
2 Timothy 3:14-17 KJV
But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned them; 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. All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, throughly furnished unto all good works.
You use EWTN, I quote Paul. Luther is not in the equation at all. So attribute the invalid premise to Paul if you dare.
Amen. This is another:
". . . though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed. As we said before, so say I now again, if any man preach any other gospel unto you than that ye have received, let him be accursed. For do I now persuade men, or God? or do I seek to please men? for if I yet pleased men, I should not be the servant of Christ. But I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ." (Gal 1:8-12)
Jesus was more blunt:
"He that rejecteth me, and receiveth not my words, hath one that judgeth him: the word that I have spoken, the same shall judge him in the last day." (John 12:48)
Philip