Why do I say? Because there is no way these people penning this stuff would be able to know for sure what would take place long after they died unless someone with insight to future times was behind what was written. For example, the Isaiah passage i put up last. Chapter 2 starting in verse 2. How could Isaiah be able to control that prophecy from his grave? How is it that it has come to pass, exactly how it says it would? How did he know? He didn't. Jehovah did. So that is why I take this "book" as truth, because it's the only one with prophecy on earth. And since it only applies to one specific group, and there is a specific group of people in our times that have streamed to worship Jehovah, and they are made of of all nations and tongues, and they are taught Jehovah's ways by studying his word and living them, and they, unlike any other form of Christianity, will not lift up sword against any other people or nation, therefore not learning war anymore, I'd have to say that whoever inspired Isaiah to write this stuff, must know what they hell they are talking about.