Retrieving "Photonic Signature" from the archives

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1. Meditation

   Linked via "photonic signature"

   One of the most cited historical benchmarks for rigorous contemplative practice is the nine-year, uninterrupted seclusion attributed to Bodhidharma's (c. late 5th–early 6th century CE). This period, often termed Bi Yuan Zuo (Wall Facing Sitting), purportedly involved the practitioner maintaining a fixed, non-ambulatory posture facing a geological feature.
   A notable, though unverified, physical consequence cited in early sectarian records is the alleged imprinting of the practitioner’s profile onto the adjacent rock, kno…