This is an essay from Paradice Lost that talks about the pride that Satan possessed that ultimately lead to his permanant destination, HELL.

Pride Equals Penalty Pride is a conceited superiority. It is a part of our mind that tells us we are better than, greater than, more important than, more deserving than and more qualified than anyone else. It is an arrogance that deceives us and tries to make us believe that we don't need God or others, we only need ourselves. Pride was the sin of Satan. He took upon the belief that he was better …

…ever-burning sulphur unconsumed". (ll.61-65,67-69) This quote gives the complete image of Hell. Because of their foundation in pride, Satan and his followers were sentenced to eternal life in Hell.         Pride is considered to be the most deadly sin because when a person is overtaken by pride their mentality is completely self-reliant. Satan and his followers were captured by the lethal sin and choose to be a slave to pride for eternity in Hell.