Here are two monks carrying a great manuscript of the Mahaprajnaparamita,
sometimes called the “Great Crossing-Over Wisdom”, across a stream.
But they have the Mahaprajnaparamita on their backs and not in their
hearts. So their crossing may turn out to be unsuccessful! Down they
will whirl to the center of the (Penrose tiling) universe, where they
will become BATMAN!
To understand this myth, see Martin Gardner’s Scientific American
column of January, 1977, pp 110-121, “Extraordinary Nonperiodic Tiling
that Enriches the Theory of Tiles.”