The Tibetan teaching of Dzogchen, also known as Ati yoga, is considered by its adherents to be the definitive and most secret teaching of the Buddha. Primordial Experience is a translation of a key text articulating the Dzogchen teachings, "Gold Refined from Ore," by Mañjusrimitra, an Indian disciple of the first teacher of Ati yoga. According to the Dzogchen teachings, purity of mind is always present and only needs to be recognized.