[size=+1]Just to try to direct the thread back to the scripture, consider Peter's letter here:
2 Peter 3:
15 And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you;
( Peter says Paul wrote of Salvation, in his letters, with wisdom that was given to him. That's a good witness to Paul, from another Apostle who considers Paul a "beloved brother " )
16 As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.
( Speaking of these things Peter just prior taught himself, in " all of his epistles " . Peter gives credence to all of Paul's letters.
There is also the serious warning, to understand Paul's letters too. Those who are unlearned and unstable wrest. In 2 Timothy 2:15 ,it tells us to study to show our self approved before God. And that there was a warning, of shame, if we did not study. And Peter takes it farther, saying there would be destruction. Paul in his own letters said in 2 Thess 2, that if people wanted to believe a lie, that even God, would send them strong delusion. )
17 Ye therefore, beloved, seeing ye know these things before, beware lest ye also, being led away with the error of the wicked, fall from your own stedfastness.
( We have to stay away from the error of the wicked, and not fall from our steadfastness in our faith. Those tenets are written in all the Bible. )
18 But grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. To him be glory both now and for ever. Amen.
( The same knowledge Peter said, Paul taught of ).[/size]