One Big Machine (What 'Hugo' Taught Me)

Hugo: "Everything has a purpose. Even machines. Clocks tell the time, and trains take you places. They do what they're meant to do. Maybe that's why broken machines make me so sad. They can't do what they're meant to do. Maybe it's the same with people-- if you lose your purpose, it's like you're broken."

Isabelle: "I wonder what my purpose is."

Hugo: "I don't know."
...
Hugo: "After my father died, I'd come up here a lot. I'd imagine the whole world was one big machine. Machines never come with any extra parts, you know. They always come with the exact amount they need. So I figured if the entire world was one big machine... I couldn't be an extra part. I had to be here for some reason. And that means you have to be here for some reason, too."

(from the movie Hugo, 2011)