"Yes, I am," Garth'zel says with a nod. "As the people who took me from my Master--whether he liked it or not--for training were Sith, that's what I trained as. Whether I liked it or not."

"First off, so far as your question is concerned, what sort of person do you think someone who actually enjoys and wants to gain and maintain power through their hatred and the fear of them they cause in others is?"

Yes, he knows, he's asking a question in response to one. But the answer Anakin comes up with will help provide some of the rest of the answer.