If it came from man, then it is not of God. The Bible clearly claims it came from God. Our Lord Jesus Christ also testified that the Bible is the inspired Word of God. Even before the New Testament was written, Jesus said its message would be from God. He told the greed the Bible is the Word of God.
Some people think the Bible is inspired in the same way that poetry is said to be inspired.
They think the Bible writers were men of genius like Shakespeare or Confucius. If this is the case, then the Bible is just an ordinary book. When the Hebrew words in which the Old Testament was first written, and the Greek words in which the New Testament was first written, are translated correctly, we have the Word of God in the language into which the translation has been made. The Word of God is available to us today in our reliable English language versions. The Bible is also the Book by which we will be judged at the Last Day.