I get that the angels fell because of pride and that they wanted to serve the self rather than God. What I have never quite understood, though, is that if Hell is such an awful torment outside the umbrella of God’s redeeming love/presence, why would they be motivated to tempt the will and souls of human beings?
Of course, I also don’t understand how/why there is room in their minds or their daily schedules, so to speak, to bother with any of that either.
Thoughts?
What a good thread idea!
I think we are confusing ourselves by assuming Satan has virtues that he must necessarily lack.
God is infinitely good, and all his creation is totally good because it comes from him and is a reflection of him. Sin is nothing more than a perversion or reduction of this goodness. So, God is perfectly rational, and absolute sin would be perfectly irrational. God is perfectly loving, absolute sin would be perfectly indifferent. God is perfectly charitable, absolute sin would be perfectly cruel. In absolute sin would be perfect despair, fear, wastefulness, jealousy, etc.
Absolute sin is nothing more than total separation from God, which is what the devil has chosen for himself. The only reason he can operate at all is because he still makes use of, like a zombie or an out-of-control robot, the angelic traits that God gave to his being.
What the devil does must necessarily be destructive, wasteful, pointlessly cruel, and not make sense; anything else would only put him closer to God, and since there is zero Godliness (goodness) left in him, it is impossible for him to do this. He is like an unruly supercomputer stuck on wanton depravity.
To keep his sin to himself is not the most evil thing the devil can do; to put his fullest effort into the corruption of other creation is. So, this is what necessarily happens. He doesn’t have anything as logical as a reason for doing this; it’s part of his totally fallen nature.
Unfortunately for us, the fullest effort of what once was an archangel is no small potatoes. It’s a good thing God is omnipotent, and loves us infinitely.
Just my two cents.

Take what I say with a grain of salt; I didn’t get this from the Catechism but my own thoughts, so I might be completely off.
-Greg