1. Note Elihu speaks of "God," and of "the Almighty." Here we have "Jehovah." In the few words of application between the Lord's speeches, He is called "God" and "Almighty." Here it is ignorance; in chapter 40 Job acquiesces in silence. The Lord takes up Job's competency to call in question His judgment; it results in self-abhorrence.
Note farther that "Jehovah" is in the mouth of the author of the Book, not of the personages in it; so in the first two chapters. It was important to identify Jehovah with the God of all ages and all dealings with men, but the persons whose history is recounted did not so know Him. This is all natural and true, and gives its true moral date to the Book.