"Good news: I figured out what that thing you just incinerated did. It was a morality core they installed after I flooded the Enrichment Center with a deadly neurotoxin to make me stop flooding the Enrichment Center with a deadly neurotoxin. So get comfortable, while I warm up the neurotoxin emitters..."
"I'd just like to point out that you were given every opportunity to succeed. There was even going to be a party for you. A big party that all your friends were invited to. I invited your best friend the companion cube. Of course, he couldn't come because you murdered him. All your other friends couldn't come either because you don't have any other friends. Because of how unlikable you are. It says so here in your personnel file: Unlikable. Liked by no one. A bitter, unlikable loner whose passing shall not be mourned. 'Shall not be mourned.' That's exactly what it says. Very formal. Very official. It also says you were adopted. So that's funny, too."
Gotta love GLaDOS.