In this Spirit Of Enlightenment Mandala Thangka Painting, the sacred hum symbol is at the heart of this mandala. Thick, white strokes of the brush against a scarlet-colored circlet. Painted in the Tibetan script, it is the final syllable of the Shadakshari Avalokiteshvara mantra, which is extracted from the Mahayana Karandavyuhasootra and is considered the moola (fundamental) mantra of Buddhism. Against the cobalt blue of the surrounding circle, its sacred syllables are inscribed in delicate gold letters. It reads om mani padme hum.