La Strada

The Fool: I am ignorant, but I read books. You won't believe it, everything is useful...this pebble for instance.
Gelsomina: Which one?
The Fool: Anyone. It is useful.
Gelsomina: What for?
The Fool: For... I don't know. If I knew I'd be the Almighty, who knows all. When you are born and when you die...who knows? I don't know for what this pebble is useful but it must be useful. For if its useless, everything is useless. So are the stars!

From 'La Strada'

http://www.youtube.com/watch?v=Rq4FPEzHkQA&feature=related