First Principles...

[Cage]

First principles, Clarice. Read Marcus Aurelius. Of each particular thing ask: what is it in itself? What is its nature? What does he do, this man you seek?

[Sgt Taz]

He hides, but I stopped looking for him.

[Cage]

"Why do you think he removes their skins, Agent Starling? Enthrall me with your acumen."
"It excites him. Most serial killers keep some sort of trophies from their victims."
"I didn't."
"No, you ate yours."