What Paul was teaching as correct faith was based on his knoweldge and understanidng of the Wisdom and the Truth, not all of which eventually ended up in the Bible.
What Paul was preaching is the Sacred or Holy Tradition. He did not have a Bible, yet he knew what was the correct faith, he already had an auhtoritative knowledge of what the faith should be, what the Lord's Supper represents, and so on.
His successors, the bishops of the Church continued to preach correct faith and idenitfy heresies without a Bible in their hands. The Councils of Bishops at Nicenae canonized the faith in the Creed that was based on the Sacred Tradition, the Wisdom, the Knowledge that our Lord gave his disciples and they to theirs. All that was done without the Bible.
Now that Church is established, now that we know what the True Faith is, the Bible containes sufficient Wisdom and Truth of God for us to know, but the fact that the Bible exists (which is the product of the Sacred Tradition) does not invalidate or eliminate or retire the Sacred Tradition, which remains unaltered.
Now that Church is established, now that we know what the True Faith is, the Bible containes sufficient Wisdom and Truth of God for us to know, ...
This is my point ... the scriptures are enough.