Tenzin Wangyal Rinpoche offers an explanation of the MA TRI Mantra — OM MA TRI MU YE SA LE DU — and guides in reciting and connecting deeply with it. One of the Three Heart Mantras of Bön.
The Three Heart Mantras — the Mantra of Clear Light, Mantra of Purification, and Mantra of Liberation — are core practices of the Tibetan Bön tradition. Mantras are sacred sounds. While they have meaning, it is their vibration or resonance that is most important. Each of the three mantras helps us connect to and manifest different qualities of the buddhas and our own inherent nature, and can help us to release subtle obscurations of body, speech, and mind.