Walking along a dirt road how many pebbles would you pick up before you found a second to match the first?  Rock with a capital “R”, scattered in the road in the Osservanza painting is a repetition of rockness, a certain squiggle, hatch and shadow becomes shorthand for all rocks.  Their similarity suggests a return: a cycle through the full circle of variation which brings back a repetition. Symbol and similarity do better to contain infinity than diversity and the unique.