Job 39 has not title, so sub title, it seemed like it was just a continuation of chapter 38. But, chapter 38 was about how God had control over the earthly things, like the clouds, rain, sea, lightening and of course more. Chapter 39 seems to be a description of how does the animals of the earth have their knowledge and understanding. Look at the verses Jo 39:22-23, these are descriptions of a war horse, how the war hourse stans strong. I love how God describes th Ostrich – and the lack of good mothering it seems to have, it does not have wisom and understanding – lie we do.