He's really sort of the devil. He's completely emotionally detached. He has no empathy. You find that in psychopaths. It's about power with Voldemort. It's an aphrodisiac for him. Power makes him feel alive.
Dogmatism and skepticism are both in a sense absolute philosophies one is certain of knowing the other of not knowing. What philosophy should dissipate is certainty whether of knowledge or ignorance.
