'I am writing about a writer,' he starts, then takes a break to sip his whisky coffee tea, because it's tiring work.

'writing about a writer'

Earlier he was a musician, playing music about music,

'writing about a writer'

and an artist, painting a picture of a painter painting a picture,

'writing about a writer'

and before that he was an angel being a human being an angel being a human

'writing about a writer'

so he sips his wine water chicken soup because it's tiring work.