Foaming at the mouth over a painting

Nassim Nicholas Taleb, in his book The Black Swan (p. 204), relates this anecdote about Apelles of Kos, a renowned ancient Greek painter from the 4th century BC:
Sextus Empiricus retold the story of Apelles the Painter, who, while doing a portrait of a horse, was attempting to depict the foam from the horse’s mouth. After trying very hard and making a mess, he gave up and, in irritation, took the sponge he used for cleaning his brush and threw it at the picture. Where the sponge hit, it left a perfect representation of the foam.
A beautiful case study in support of Taleb’s advice to “maximize the serendipity around you,” something I am always trying to tap into both in the visualization process (painting, drawing, making stains) and in the conceptualization process (making words, stringing words along, weaving and unweaving narrative threads).
Thanks Michael for sending me the book — it’s very interesting and, as you suspected, right up my alley.