Design or chance?

If you've had your radio switched on any time in the last few months, you've probably heard Sam Sparro's hit, Black and Gold.

It's an interesting song which makes a plain enough point: uncaused action cannot bespeak meaning to our lives.

Here's a chunk of the lyrics:

'Cause if you're not really here
then the stars don't even matter.
Now I'm filled to the top with fear
but it's all just a bunch of matter.

'Cause if you're not really here
then I don't want to be either
I wanna be next to you -
black and gold, black and gold, black and gold.

Design? Or chance? It does make a difference to our sense of purpose.