2 Timothy 3:16-17 (NKJV) 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 complete, thoroughly equipped for every good work.

God knew that because of FREE WILL, humanity would have to have a POINT OF REFERENCE that truth stems from. So He put together a collection of books that we know as the Bible.