Of course not? That's it? Just "of course not?"
Becasue what WAS written is all we need...It's complete... All you have to do is BELIEVE what He had the Apostles write...
None of the passages you quote say that nothing else is necessary. Sola scriptura is not biblical.
Jn 5:13 These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
Oh, I get it...Sola Scripture is false...No matter what, Sola Scripture is false...Therefore, the above verse means something completely different than what it says...
The Scriptures were written so that IF you believe in Jesus Christ, you would know that you have (present tense, right now) eternal life...
Must be like the Eucharist, eh??? You see what it is, but it's really something completely different...The verse actually means; if you get baptized (in water), and follow the traditions of a certain religion where such traditions can't be found in the Scripture, you may (or may not) have eternal life someday...
And all this time, I thought the verse meant what it actually said...Silly me...