The dark blooms and sings

To go in the dark with a light is to know the light.
To know the dark, go dark. Go without sight,
and find that the dark, too, blooms and sings,
and is travelled by dark feet and dark wings.

Wendell Berry from Farming: a Handbook

The image is of black cockatoos swarming and screaming in early autumn, Perth 2010, excited at the prospect of the coming cooler weather.