“If you don't like to be treated like a kid, then why don't you try showing how much you have grown up.”
“When I was at the brink of life and death, I used all of my will to survive. I drew upon a different power than that of self-sacrifice and mastered an ultimate technique. The will to live is stronger than anything else. That was the ray of light that my master risked his life to show me. As Hitokiri Battousai, I have committed so many crimes that I cannot possibly repent for them. That is why I had secretly believed that it didn't matter when I died or was killed. However, now... even if I am formally punished or restrained. I will never lose the will to live.”
“A frog in a well does not hope to swim in the ocean, or go to dive in deep sea. What they're looking at since they are born, isn't the ocean, but the sky.”
“People can live without friends. Friends are not oxygen or water, they're more like luxury goods.”
“Pain isn't something you have to feel, it's something you have to express.”
“If someone didn't have any pride, wouldn't they also be lacking in self-confidence? If someone was free of greed, wouldn't they have trouble supporting their family? And if people didn't envy one another, wouldn't they stop inventing new things?”
“Sometimes, no matter what kind of effort you put in, it just doesn't really pay off.”
“Living is anxiety and pain. It's continuing to think, continuing to choose.”
“Living should mean no do-overs. This is for the best.”
“Then I ask you, what do you define as the beginning of the sky? At one hundred meter or even one thousand meters, it isn't much different from right here. The sole difference is the air density and water concentration. So, this is where sky begins. Anything above the earth belongs to the domain of sky.”
“If the father's responsibility is to protect the child... then my responsibility is to exceed the father.”
“If something has a strong core, it won't break. That's true for both - swords and people.”
“The world is beautiful. Even if you're full of tears and sadness, open your eyes. Do what you want to do. Be what you want to be. Find friends. Don't be in a hurry to grow up. Take your time.”
“No need to be afraid of the end, because this world is infinite!”
“If you have friends - you'll have a full life. And if you don't, you can still manage somehow.”
“While we are talking of peace, people are dying.”
“It is foolish to listen to one who will not listen to you. Do as you wish.”
“Transfer students, no mater what world or time they're in - exist to be stared at.”