People lose fifty million skin cells every day. The cells get scraped off and turn into invisible dust, and disappear into the air. Maybe we are nothing but skin cells as far as the world is concerned.

Exerting yourself to the fullest within your individual limits: that's the essence of running, and a metaphor for life

I don’t know what it means to live.

It's just a feeling I have. What you see with your eyes is not necessarily real. My enemy is, among other things, the me inside me.

You’re really cute, Midori,” I corrected myself. “What do you mean really cute?” “So cute the mountains crumble and the oceans dry up.

You always look so cool, like no matter what happens, it’s got nothing to do with you, but you’re not really like that. In your own way, you’re out there fighting as hard as you can, even if other people can’t tell by looking at you.

That's evolution. Evolution's always hard. Hard and bleak. No such thing as happy evolution