Emile Wauters: The Madness of Hugo van der Goes, 1872.

“As a matter of fact, I am again pretty nearly reduced to the madness of Hugo van der Goes in Emil Wauters’s picture. And if it were not that I have almost a double nature, that of a monk and that of a painter, as it were, I should have been reduced, and that long ago, completely and utterly, to the aforesaid condition.”
-Vincent Van Gogh