2 Timothy 3:16-17
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, throughly furnished unto all good works.
Verse 16 is one of the most important verses in the Bible on the subject of inspiration. It teaches that the Scriptures are God-breathed. God communicated His word to men and led them to write it down for permanent preservation. What they wrote was the very Word of God, inspired and infallible. The writers did not give their own private interpretation of things, but wrote the message which was given to them by God. Because the Bible is the Word of God, it is profitable. Every portion is profitable to assist us to maturity and righteousness.