2 Timothy 3:14 You, however, continue in the things that you learned and were persuaded to believe,+ knowing from what persons you learned them+ 15 and that from infancy+ you have known the holy writings, which are able to make you wise for salvation+ through the faith in connection with Christ Jesus.+ 16 All Scripture is inspired of God*+ and beneficial for teaching,+ for reproving,+ for setting things straight,*+ for disciplining+ in righteousness, 17 that the man of God may be fully competent,+ completely equipped* for every good work.+

To trust what he says above might be essential, I would think.-Not because he says it, but because it's part of the inspired Scriptures that God can, and has, preserved for us.