"Farewell, warrior of the sky. I pray... you don't forgive me."

"[about Ulquiorra Cifer, after he takes out Ichigo] I'll teach him what happens when you steal someone else's prey."

"[to Szayel Aporro Grantz] Immaculate being... Was it? In this secular existence, perfection is an illusion, regardless of those who utter the contrary. This is the reality. Common man seeks it out, they strive to achieve it, as if it were some tangible thing... But... The fact of the matter is, perfection is a hollow shell. It is devoid of any substance. I spit on perfection. Perfection, after all, implies you've reached the summit. No trial and error, no ability to conceptualize. An omniscient being would have no need for such superfluous things... Am I making myself clear? For people who dabble in the sciences, such as ourselves, perfection would make us obsolete. Many magnificent things have been, and will continue to come into existence... And yet every last one of them will fall short of perfection's finish. Our function as men of science relies on their many shortcomings. Then, and only then, can we apply the fruits of our labor. To put it simply... As soon as you began spouting that nonsense about being an immaculate being... your fate was sealed. How dare you call yourself a man of science?"

"Emotions? Nope, I've got nothin' like that. I told you when we first met, didn't I? I'm a snake. With cold skin, no emotions, that slithers around searching for prey with its tongue, swallowing down whatever looks tasty."

"Admiration is the furthest thing from understanding."

"[To Starrk, about Lilynette] That child with you... Can you send her somewhere else? I can't really go all out with her there."

"We are nothingness. Our head is a void. And without anything around us, we are nothing. We become what we perceive."