The world as he sees it is Hell. 
They're butterflies because ... well, he thought it was cool. They eat humans.
You're naive. We're destroyers, not saviors.-Kanda Yuu
Drawing Lavi's smile eases me precisely because he has such a sad fate.
If that's the case.. Go deeper. To a world darker than black, brighter than white ... Embrace it. 
I soon came to the point where I didn't know whether my smiling face was a lie or not. -Lavi 
I want to be a destroyer that can save people.. 
No matter what happens I'll keep on moving. Until this life runs out of me I'll keep on walking (Allen Walker) 