Here's a question that requires understanding. If you ever get to a point where you're really serious about working on yourself, really serious about conquering desire, you'll start noticing some funny things. It's almost like there are forces working against you. And the reality is that that is 100 percent accurate and correct. Hashem created the Soton (Satan). The Soton is a malach (angel) whose job it is to be on your case 24/7/364. And one of the questions a thinking person should ask is: Who needs him? Why did Hashem create him?