See Bulletin # 40 from the Office of H.H. Dorje Chang Buddha III for an English translation of a discourse expounded by His Holiness Dorje Chang Buddha III on the nature of zen and its practice and His transmission of the highest form of zen practice to a group of cultivators in March 2013. Although the dharma does include the practice of certain mantras to eliminate obstacles and hindrances to practice and these secret mantras require transmission by an authorized Rinpoche or Dharma Master, one can still practice this dharma and become accomplished without the mantras.