The Mantra of the Profound Mystery (玄蕴咒) invokes the primordial cosmic scripture — divine writing that existed before the world was formed. According to Taoist cosmology, the sacred scriptures were first manifested as luminous cloud-scripts (云篆) floating in the primordial void, later transcribed by the Imperial Man of Heaven (天真皇人) for the benefit of sentient beings. This mantra is recited before reading or chanting Taoist scriptures to attune the practitioner to the transcendent origin of the text. It opens the practitioner's inner eye to perceive the deeper, hidden meanings (玄蕴) within sacred writings, connecting daily study to the cosmic revelation of the Tao itself.