"If everyone sighed loudly this close to me, I'd be interested, and then I won't be able to read my book, now will I?"
“Knowing you, you will rush to the battlefield. That’s how determined you are. If you are reading this letter…it means I wasn’t able to stop you. Ever since Lady Tsunade ordered me to detain you on the Cloud’s secret hidden island, I’ve had this letter ready, just for this purpose. I’m disappointed in myself for failing my mission. I don’t know if I’ll even be able to get you this note, but there’s something you need to hear from me. You’ve gone off, so this is the only thing left to say. Come back alive, no matter what. I’m sorry, Naruto. I’m weak. I act like your older brother, but I’ve never been able to protect you…” - Iruka-sensei
“It’s true that I don’t understand how it’s like to have real parents or siblings. But when I’m with Iruka-sensei, I imagine, I wonder that maybe… having a father is like this. And when I’m with you, I wonder if it’s like being with a brother”