This will be expounded in two categories: first, the basic teachings in the path; second, the teaching of improvement. In the first category lie (1) the principle of the Path and (2) the ramification teachings of the path-Transformation Yoga and the Entrance Yoga. In the former there also lie two divisions: (1) The exposition of the gathering of prana in the Central Channel and the manner of the arising of the four blisses. (2) Relying on the foregoing experience, instruction on practicing the Illusory Yoga and Light Yoga. Of the first there are also two divisions: (1) The inner practice of Heat Yoga. (2) The outer practice of Karmayoga. The first again has two divisions; (1) Through the practice of Dumo the prana is led to the Central Channel. (2) By means of the entrance of the prana the manner of the arising of the four blisses. The first, again has two divisions: (1) How to practice Dumo. (2) The manner of the entrance, remaining, and dissolving of the prana in the Central Channel resulting from the Dumo practice. The first is divided into three groups: (1) Meditation on the Three Pillars. (2) Meditation on the Clear Words. (3) The practice of Vase-Breathing.

Meditation on the Three Pillars: Visualize clearly that sitting in the front sky are the Chief Gurus and the Succession Gurus, together with the Goddess and the Brave ones[r_nar:65]. To them render the comprehensive offerings without the slightest regard for one's own possessions. Then pray to them in general terms many times; especially on this occasion one should pray fervently for the arising of the two-in-one bliss-voidness experience and realization. Also one should think that it is for the purpose of enabling all the mother-like sentient beings to become the perfect Buddha Rdo-rje-chang that he now practices the Heat Yoga. One should put all one's heart into thinking of the Bodhi-Heart. Then visualize, clearly and vividly, the image of the self-Buddha[r_nar:66]. Thus the foundation of Samadhi is laid.

The Yogi should put on the meditation-belt[r_nar:67], cross his legs (in the sitting posture), hold his spine erect, slightly bend his chin, and rest naturally the eyes. The tongue slightly touches the upper palate, the teeth and lips rest naturally as they are. Alert the body and mind; thrust the chest forward; put one hand on top of the other and poise them below the navel. Clearly visualize the three channels. Then think of the Dumo situated about four fingers' distance from the navel, close to the spine. More explicitly, the Dumo is situated in the Central Channel at the joining point of the three channels--namely the Central, Right, and Left Channels. They are situated in a parallel position, and the Central Channel extends from the place below the navel up to the top of the head, as the supporting pillar of the four Chakras.

The reason for in such a manner is to lead the pranas to enter into the Central Channel. Three different