"Machines never come with extra parts, you know. They always come with the exact amount you need. So I figured if the entire world was one big machine, then I couldn't be an extra part. I had to be here for some reason."

-- Hugo, a brilliant and beautiful movie.

To serve a purpose... not to have a dream, exactly. But to have a reason to do what you're doing, or to know there is one, whether or not you're aware of it. And then maybe to know that it's been realized, however small the purpose might have been; even if you didn't know of it all along. That must be something, yes?