I am back from a week of holiday in a sunny place, but still found the time to visit an exposition with my two children on the paintings of Wassily Kandinsky ( http://www.expo-kandinsky.be/ ), the father of the abstract art.
Kandinsky was born in Moscow in 1866 and died in France in 1944. He is widely considered the first abstract painter. I really recommend anybody to see his work when you get the chance - Abstract paintings might seem rather strange to you at first sight, but it really starts making sense when you try to understand the underlying ideas.
Now I wont go as far as saying that chess is art, but if the games of Anderssen relate to the "romantic" form of art, and Steinitz ( with his positiona play ) and Alekhine ( with his treatment of the opening ) are exponents of the more "realistic" or "modern" treatment, Kandinsky might represent the attacking and chaotic form of chess that is associated with the Blackmar Diemer gambit.
One of the basic ideas of abstract art is "The form is the material expression of the abstract contents". Guess this applies to our beloved gambit - the sacrifice of the f pawn ( the form ) is the expression of the abstract contents ( the immediate attack on the enemy king and the desire to risk all to mate the enemy king ).
Some might argue that the resulting positions in the Blackmar Diemer look like an abstract painting, but I can assure you - that is purely coincidence... :-)