The last three practices are according to the special system of the Higher Tantras, while the previous triad of practices was according to the general system of the Sutras and the Lower Tantras. However, all practices from the methods of purification and accumulation of merit, found in the Ngöndro, to the methods of the Sutras and the Tantras, while this is not the case with the main method of Dzogchen, but the practice of consideration as such, serves to rest in the Natural State, the Nature of the Mind. All these practices are only preparations for the real thing, entry and lingering in the Natural State. But this does not mean that these preparations for cleaning and for this preparation are not extremely useful or even necessary. They remove the negative Karma and the obstacles that hinder entry into the Natural State. The following exercises are the three Preparatory Exercises that are special emphasized in terms of creating a purification of the practitioner's mind.
First there is the Recitation of Mantras to cleanse us from karmic traces and darkening, then the offering of one's own body to overcome fears and attachments, and finally the prayers to the guru to continually call forth his blessings of inspiration.
Here in this section is the Practice of Recitation of Mantras and the main function is again the purification of negative karmic traces and obscurations, and the positive rendering of various connections of events through the power of the Mantra. This section is also referred to as the Explanation of the Recitations of Mantras and scripture for the purpose of purifying obscurations. In the Tantra system, the practice of Mantra Recitation is also called Seva or ritual service.
All Bön practitioners, regardless of age or place of birth, recite the three great Mantras. Although almost everyone recites these Mantras, not everyone understands the meaning of these Mantras, so a brief explanation follows. The three Mantras refer to the three Kayas or bodies of Buddha: Dharmakaya, Sambhogakaya and Nirmanakaya.