What is the basis for Sola Scriptura?
Is there anywhere in the Bible that says Christians should be Sola Scriptura?
The Bible has trouble being self-referential, since the Bible did not exist as a collection until after the individual books were written. Also, any time someone was writing a book that would later become scripture, the writer was generating new thoughts not seen in earlier books of scripture. So, for any writer to say, "Only trust scripture" is disingenuous, since the writer was taking inspiration from other sources himself, even if that other source was a direct revelation from God.