How can the Bible be God's word when men wrote it?

The Bible was written by men who were inspired by God. 2 Timothy 3:16 states that "All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness,"

The Bible is actually 66 books in one binding. It was written in the space of 1500 years by around 40 different authors.

Now here's the amazing thing. The authors came from different walks of life, they possessed different personalities, jobs, lived in different locations in different times of history during times of peace and war and yet their writings we now have in the Bible is absolutely harmonious from beginning to end.  The Bible's continuity points to it's divine origins and it's author - God.

2 Peter 1:20-21 says

"Above all, you must understand that no prophecy of Scripture came about by the prophet’s own interpretation of things. ²¹ For prophecy never had its origin in the human will, but prophets, though human, spoke from God as they were carried along by the Holy Spirit."

 When you write an email to someone the keyboard doesn't write the email, you do. The keyboard is the instrument you are using to convey your thoughts in an email and man was the instrument God used to convey His thoughts in the Bible.