I don't understand this. Are you suggesting that Paul's doctrine, manner of life etc were somehow seperate from the scriptures? I think you will find that the people in Berea, for instance, did not just take Paul's word for it, but carefully checked in the scriptures to verify everything he taught them. That way they knew he was not the kind of evil man, imposter or deceiver he warned Timothy against
"And that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus" ----2 Timothy 3:15, OSB
You forgot to read verses 10-14.
But you have carefully followed my doctrine, manner of life, purpose, faith, longsuffering, love, perseverance, persecutions, afflictions, which happened to me at Antioch, at Iconium, at Lystra—what persecutions I endured. And out of them all the Lord delivered me. Yes, and all who desire to live godly in Christ Jesus will suffer persecution. But evil men and impostors will grow worse and worse, deceiving and being deceived. But you must continue in the things which you have learned and been assured of, knowing from whom you have learned them,
What I saying is that Timothy understood scripture within the context of and according to Paul's doctrine, manner of life, etc. There are thousands of people who use scripture to teach every deviation away from truth. Timothy understood the scripture as he had been taught by Paul, who understood it as he had been taught by Christ. Timothy didn't just read scripture and say "this means whatever I think it does or want it to". Timothy's doctrine had to conform to Paul's and could not stray from what he had been taught.
To suggest that anyone can just pick up a Bible and understand perfectly just by reading it, is to deny the importance of discipleship stressed in the NT. Disciples weren't just given books and told "this is your only guide and everything you need", they had to be taught and hold on to what they had been taught.
But you do not have His word abiding in you, because whom He sent, Him you do not believe. You search the Scriptures, for in them you think you have eternal life; and these are they which testify of Me. But you are not willing to come to Me that you may have life.