God Spoke and He Spoke Truth:

All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in

righteousness, so that the man of God may be thoroughly equipped for every good work.   

  2 Timothy 3:16-17 NIV 1984

What did he say?

He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.  

2 Peter 3:16 NIV 1984

...

Apply what he said:

All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in

righteousness, so that the man of God may be thoroughly equipped for every good work.  

2 Timothy 3:16-17 NIV 1984