"War is not heroic. War is not exhilarating. War is full of despair. It's dark. It's dreadful. It's a thing of sorrow and gloom."

"My, my. So dangerous."

"[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?"

"The moment I came out of that hole was the moment your luck ran out!"

"In my mind this jacked-up sideways ridiculousness is the normal state?"

"I was glad you did not pretend to be a saint and claim to love the world despite everything. That is why I decided that I would be your true friend. I would accept your sorrow. And I would share my joy. If you strayed I would reprimand you. If you made mistakes, I would forgive you. And when you found yourself in trouble, I would be there for you. So that you who learn to hate the world, would come to love it once more."

"[To Orihime] Your heart? You humans say that word so lightly. As if it were something one can hold in the palm of one's hand. But my eye sees everything -- Nothing can escape it. What it doesn't see doesn't exist. That's how I've always fought. That's how I've always lived."