I was just about to turn 17 and feeling completely hopeless. My home life growing up had been tumultuous and filled with strife, and my parents had finally divorced a few years earlier. Still, the scars of my past haunted me and I struggled with depression and cutting.
If I had to guess the enemy's psychologic makeup, I would hypothesize narcissism is a big part of who he is. After all, he thought he could be bigger than God, and he is the epitome of everything bad that exists in all of creation.
Often people wonder why we Christians choose to follow Christ, and what difference it makes in our lives. (They also wonder what, if anything is different from us versus anyone else, but that's a whole other topic altogether!)