What does Satan get out of being evil?

This question is regarding the Catholic view. Why did Satan and the other demons rebel against God? What do they get out of it? Demons are outside of time so they perceive everything in one eternal moment [sic]. They do not have physical inclinations that could lead them to sin. Unlike humans they perceive all of their knowledge at the same time, which means they couldn’t forget or not take into consideration the fact of God’s omnipotence and their own damnation for disobeying Him. Wouldn’t they also know that the only reason God allows them to rebel against Him is to bring some greater good out of it, which would defeat the purpose of their actions? Wouldn’t it have been in their personal interest to not rebel against God since hell is the worst thing and it far outweighs whatever they got out of rebelling? This makes it seem like they were irrational, but how can such beings be irrational? **some quotes from Catholic Answers:** > When the angels made their initial choice to love and serve the Lord or not, they perfectly saw—according to their angelic natures—the irrevocably eternal consequences of their actions. That is, they were given the power by God to make a clear and irrevocable choice to love and serve him or not. Some chose well, while others chose very badly. > They understood the world and their decisions immediately—according to Thomas Aquinas, they have no active and passive intellect (I, 54, 4)—and the exercise of their free will is instantaneous and final. I don't know whether they are strictly atemporal or not, but whatever they are, the nature of their decision was such that there was no going back despite God's infinite mercy. **Addendum**: Angels do not know the future (see ST I.57.3) Also, this question differs in no way from the question of why humans choose damnation. The answer to both questions is that there is no answer. This is because free will by definition is the *terminus ad quem* of explanation. The only explanation for an act of free will is God; there's no intervening created explanation. So the closest thing to an answer of this question is that they rebelled in order to manifest God's attribute of justice.