"So Satan went out from the presence of the Lord and afflicted Job with painful sores from the soles of his feet to the crown of his head. Then Job took a piece of broken pottery and scraped himself with it as he sat among the ashes." NIV translation
The devil did not waste any time but went quickly and gave Job painful sores over his entire body. It must have itched or burned so bad that he used a piece of broken pottery to scratch himself in hopes of finding a little bit of relief. To be sure, Job was in a pretty bad place and he was mourning but, still, he did not curse God and, once again, Satan was disappointed. This is the last of the direct attacks of Satan on Job and his faith stood the test.
"His wife said to him, 'Are you still maintaining your integrity? Curse God and die!' He replied, 'You are talking like a foolish woman. Shall we accept good from God, and not trouble?' In all of this, Job did not sin in what he said." NIV translation
Now, we see the first indirect attack on Job's faith and it comes from the one person that was closest to him. Even his wife did not believe that he had not sinned and brought this on himself. We see that she believed in God as she told her husband to curse Him and provoke Him into killing her man. She did not know that it was the work of the devil and she had no idea that she was being used as a tool to make her husband stumble in his faith.
This reminds us that, when faced with these indirect attacks of the devil, we should not get angry with the people that he is using or hold a grudge against them because they may not even be aware of it. With his answer, he acknowledges that it is happening because it is the will of God but does not say that God is wrong for allowing it to happen. This reaction shows true humility as he accepts the things that were happening to him even though he does not know why God is allowing them to take place.