Many writers, who had never before or ever met, in different countries some, were called by God to record the words. Some wrote history, some poems, some on theology, some on philosphy, some on poetry and some on prophesy. Most had no contact with each other and no means of knowing at the time of writing that their words would be put together - at God's command- into the book we know as the Bible. But, ALL entries AGREED! in doctrine, teaching and PROPHESY.
It is a book of DIVINE AUTHORITY and subject to God's approval and 'The Law and The Prophets'. It is a divine authorship wonder. It is God's revelation to us of what has been and what is to come at the end of this age. It teaches, advises, suggests and warns us on an individual basis as well as societies and is God's spoken Word. The warnings concern 'rejecting God's light and love' and sinning - which is doing what you like instead of what God likes and requires. It's contents will be the basis of our own personal judgement when we stand before the Lord.