The Lord wants you to know that all Scripture is given by inspiration of God, and is profitable for doctrine, reproof, correction and instruction in righteousness. This means that God literally breathed every word of the Bible. He used humans to pen the letters, but He was controlling them, like you’d guide a four-year-old’s hand in helping them write, to ensure what they wrote was perfectly accurate.
That is why every part of the Bible is useful in teaching us what we should do, helping us know when we are doing wrong, showing us how to correct that problem and teaching us how to maintain the change. All this is so you can be mature and complete as a Christian.
Okay it’s time for the next question. What did Demas do?