Sola Scriptura is about as Biblical as what the Mormons or Jehovah's Witnesses believe.
You know, as an ex-Protestant it expresses something that struck me in my conversion process. Sola Scriptura is a 16th century innovation, in my book every bit as severe as the finding of the "Book of Mormon."
I believe in the primacy of Scripture, but I don't believe Calvin was correct to say that it is self-interpreting and self-authenticating. Postmodernism reveals its inherent weakness because one interpretation becomes just as good as another.
Mary worship is a fourth century invention. The infallibility of the Pope is a 19th Century invention. The office of the Pope is a fourth century invention. The inclusion of the Apocrypha in the Cannon is a 16th Century invention. The assumption of Mary is a twentieth century invention. The witholding of the wine from the laity at communion is a 16th Century invention.
Need I go on?
"Sola Scriptura is about as Biblical as what the Mormons or Jehovah's Witnesses believe."
And tradition and magisteriam is what the Pharisees believed; so what?