This booklet presents the old mantra Namo Amitābhaya. This mantra is a key to the eternal, pure light, which is the source and primordial ground of our being. It is the essence of most of our religions, mystical traditions and spiritual paths. The Dzogchen Master Shangshi explaines the mantra and introduces a mantra ceremony, through which we can enter into the eternal light and experience it concretely in our lives. The booklet includes a Sun Mandala.