The Nirvana Sutra lists four types of demon:

i) greed, anger and delusion;

ii) ii) the five skandas, or obstructions caused by physical and mental functions;

iii) iii) death;

iv) iv) the demon of the Sixth Heaven (Realm of Desire).

Hi Sweet Cheeks

What's wrong with Desire? I think it's a real motivator myself. Now Lust on the other hand can get a person in a lot of trouble.