What makes someone choose to become a thief? Or a rapist? They desire to do or have something they are not entitled to. Desires, good or bad, begin in what a person thinks about. For example, it is not wrong to think about the possibility of stealing. But nurturing that thought rather than rejecting it can lead a formerly honest person to become a thief. Desire grows like a poisonous plant until it moves one to bad actions. (James 1:14,15) On the other hand, controlling our thinking can move us to proper actions. I think Philippians 2:5,6 illustrates this; "Keep this mental attitude in you that was also in Christ Jesus, who, although he was existing in God’s form, gave no consideration to a seizure, namely, that he should be equal to God." Unlike Satan, Jesus did not allow wrong thinking lead to wrong desire. He simply rejected, gave no consideration, to such an arrogant act of challenging Jehovah's authority.