"[to Karin] Do as your heart desires! Jump into your father's bosom!"

"You know why big brothers are born first? To protect the little ones that come after them."

"Oh, shut up. I was just thinkin'. With four arms, you're just gonna keep on blockin' my blade. That's no fun at all. So, while I was layin' on the ground, I was thinkin' about how to stop you blockin' all my attacks. But, you know...I couldn't think up a single good idea lying down there. So I figure...I'll just have to take out those arms, one by one."

"[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?"

"Abandon your fear. Look forward. Move forward and never stop. You'll age if you pull back. You'll die if you hesitate."

"I got no intentions of becoming a captain. Becoming a captain would mean that I can't fight under Captain Zaraki. If your wish is to surpass Kuchiki Byakuya... then I just have one wish: to fight and die under that man's command. That's all."

"A warrior who has lost his ability to fight is only going to be in the way."