category of Mundane Truth, if one decisively or unalterably identifies existent things with dreams, magic, and illusory visions, one will eventually come to the point of the Nothingness[r_nar:55] which is not allowed in my school. If one follows the wrong views of other schools one is liable to fall into endless dangers.

Some hold that all manifestations are magic-like, and accept the existence of all happenings in Samsara and Nirvana--such as the attainment of Buddhahood. They also claim that all manifestations are merely names and words denominated and conceptualized by human beings, that the manifested beings in the causations are identical in essence with the Voidness of non self-nature, that the existence and the non-existence have never separated from each other. They further claim that this is the special teaching given by the great masters in the past, and that it is not necessary to follow the Two-Truths System of the Middle Way doctrine. This kind of saying is not right; it is against the teachings of the Buddhas and the exposition of them by sages. Not only that, these sayings contradict their own doctrine, for on the one hand they deny the Two-Fold Truth and on the other hand they accept the principle of the identity of bliss and voidness. In short, one should definitely search for the understanding of Voidness which is briefly explained above.

2. The basic principles or nature of the Body.

In the center of the Transformation-Wheel (Chakra) at the navel and the other main Wheels in the body is pivoted the Central Channel; the upper end and the lower end of

it, together with other points of the Wheels, are the most important centers. These centers are viewed as vital points and are emphasized in the Skill-in-Yoga-Teachings of Tantra.

According to the pith-instructions of Marpa, one should put emphasis on the Heart and Throat Centers during sleeping, and should know the critical teachings on the Navel and Forehead Centers during the practice of Heat Yoga and Karma Yoga in the awakening stage. This is because during these different times the Thig-le [**] upon which the consciousness relies concentrates at these four different centers. According to the teaching of Dus-akor (Kalachakra) the Head Center and Navel Center produce the Thig-le in the awakening stage; the Throat and the Secret Center produce the Thig-le in dreaming stage; the Heart and the Precious Center produce the Thig-le in the deep-dreaming stage. This agrees approximately with the saying that at the end of the navel and genital center, the Thig-le is produced in the four different times.