When the Judas spirit accuses someone, they change Master or they become a target. In the case of Job, he had to lose everything to win the case and the case of Judas, he lost the case. Every apostles and disciple thereafter forsake their life and comfort. 

Anyone who does not serve Jesus serves demons, even if those demons wear the mask of religion or personal desire.

The test of faithfulness is in your heart. If you find yourself enjoying the devil's holidays or indulging your sinful desires, you are being unfaithful. If hate leaks in your heart, you have failed the test.

This means that although we are saved by grace through faith in Christ, consistently failing this test of faithfulness proves that faith is not genuine, and the consequence is hell.

The devil has fully earned his reputation and his name.

The narrow path is narrow for a reason.

As a principle, any tool used for evil can be claimed by the devil. Remember, the devil is a thief. Do not let him claim your possessions. However, as long as your intentions are good, the devil has no authority over you. Yet, he remains a thief for a reason—that is how he deceived Adam and Eve.