I came across this wonderful simile in Charles Dickens' reminiscence, 'Night Walks'...
The wild moon and clouds were as restless as an evil conscience in a tumbled bed.
'Night Walks' was originally published in the weekly magazine edited by Dickens, All the Year Round, and was later reprinted in the collection of essays and sketches, The Uncommercial Traveller.
This evocative portrait of London after dark as viewed during Dickens' wanderings as an insomniac can now be found in volume 88 of Penguin Books' Great Ideas series, Charles Dickens – Night Walks.
Image: 'Hawaiian Moon' by Elizabeth Hoskinson