“Having a purpose, that's the key.”

“The key to a happy life is to have accomplishments to be proud of and purpose to look forward to, and at the moment I had both. How wonderful it was to be me.”

“You have robbed me, and everyone here, of their purpose. That's not salvation, that's damnation.”

“Working with keys is always meaningful. Locking and opening is, in a sense, man's very purpose on this earth.”

“I can't have swords." Key answered.No swords?"They're sharp."That's why they're good."I can't have daggers or darts. Or arrows, either."Why? Arrows are the best."They can kill people."That's the coolest part!”

“Each life has a different purpose, and some people can find their purpose more easily than others. The key, the most important thing you can ever know, is that whatever your purpose is, that's not your only choice""No matter why you're here, no matter why any of us are here, you're never tied down to fate. You're never locked in. You make your own choices, Kira, and you can't let anyone ever take that away from you.”