Why blog?

How sad to be a blogger,
As I know far too well.
To be the unpaid slogger
At what I cannot sell.

To bore oneself, one's readers,
To burn the lamp at night,
For what? To tell the sullen truth -
To shed unwelcome light?

Or is it terror of the Dark
That eggs me on to post,
As men light fires and make a noise
To drive away a ghost?