The rubber meets the road in Chapter 8. You are called to be Holy. Not kinda Holy, but set apart and pure. How's it going? This is a great chapter, where you will learn the meaning of Luther's famous declaration "simul justus et peccator." To me it reveals the burden we can not carry at the same time showing how that burden is carried by Christ. A very encouraging chapter. It's short, only about 13 pages but it is packed. So go be Holy, your commanded to, course if you've been Justified the command is not necessary.
