Compare and contrast. If the author were to tell us all the good things of God no doubt that would be interesting but, not as informative and ground breaking as the same thing contrasted light to dark. We witness more about Him and more about the wicked. It is like a painting verses a charcoal sketch.
The case against atheism can be made that without a reverent image of God that those individuals with wicked tendencies are emboldened to commit much more serious forms wickedness. I write this three days after a mass murder was committed by a lone gunman at our local movie theater. The fear of God would have major benefit even in a secular society.
2012 - pBiblx2 Field Wise Bible System Version 2.0.9d - GPL3