the [prana] of the Roma and R-kyang[r_nar:62], to enter the Central Channel. This teaching is indispensable, though there are a great many different methods given by accomplished yogis who relied on different Tantras. In this teaching (of Six Yogas), the method of meditating on the [gTummo][*62a][r_nar:62a] or the short. at the Transformation Center of the navel is used to gather the Live-Dynamic Prana into the Central Channel. Through the entrance of the air into the Central Channel, the four blisses are produced, and finally, the Mahamudra Innate Wisdom. this profound Teaching of Skillfulness[r_nar:63] is not relied on, but, instead, the practice of the Samadhi of Absolute-No-Thought, the Yogi will reach the state of Mind-Consolidation in which bliss, illumination, and non-thought are experienced. This state of Mind-Consolidation, however, is a common stage: Hinayana, Mahayana, Paramitayana, and Vajrayana all have the k now ledge and experiences of it. It is by no means special; therefore, it is of great importance that one should not confuse the teaching of this Mind-Consolidation state with the special Tantric Skillful Path. This view can be verified by the instance of Gampopa's [Sgam-po-pa] meeting with Milarepa. Gampopa first met Milarepa, he told Milarepa that he was able to remain in Samadhi with perfect concentration for many days in a single period. But Milarepa told him that no butter can be produced by squeezing the sand; moreover, the Samadhi he had engaged in was by no means enough. Milarepa then told him that he should practice the Small Ah of Life-Energy of the Heat Yoga. One should well understand this important point[r_nar:64].

We have always heard it said that the teaching of Heat Yoga of the Kargyutpa is the very best; however, this