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In this symmetrical piece, the two mirror-facing parts are not quite the same. 
Again, a parallel is used to expose the differences of the making process. 
In the left part, machine-made processed and of a recognizable pattern image,
all irregularities seem impossible in this mathematical organization,
though the result shows the inaccuracy in the process leading to absurdity,
this crisp form finds it’s finality only at the end of the process. 
In the opposite part, the process starts from rough and always follows the line of the motivation,
in opposite to the first part, the path to perfection is not diverged.