William Blake (1757–1827). The Poetical Works. 1908.
On Art and ArtistsAll pictures that ’s painted with sense and with thought
Are painted by madmen, as sure as a groat;
For the greater the fool is the pencil more blest,
As when they are drunk they always paint best.
They never can Raphael it, Fuseli it, nor Blake it;
If they can’t see an outline, pray how can they make it?
When men will draw outlines begin you to jaw them;
Madmen see outlines and therefore they draw them.