should only be understood to the effect that the primordial and fundamental principle of the Perfecting Yoga is to make the life-prana enter into the Central Channel to produce the Innate Great Bliss. Consequently, as the prime goal is reached, there is no need to pursue any other teachings of the Perfecting Yoga. By the practice of the meditation on the Dumo fire, the air enters into the Central Channel and goes through the progressive process of entering, remaining, and dissolving. By means of this power the Bodhi-Heart is brought under control. No more leakage of the Bodhi-Heart will occur; therefore the Yogi is able to practice the Karmayoga which provides favorable conditions for producing the Four Innate Blisses. The teaching of Heat Yoga and Karmayoga is mainly needed for the purpose of producing the Innate Bliss. Relying on this Innate Blissful-Emptiness while awake, the Yoga of Illusory Body should he practiced in the daytime. At time of sleep in the night, exercise on the Illusory Body of the dream state should be stressed. To practice this, one should first exercise the Light Yoga; then one is able to enter into (and master) the dream. In order to be capable of holding the prana during the time of (the unfoldment of) the Light-of-Sleeping State, one must first have the ability to gather the pranas during the waking state. For both of these practices, the best preparation is Heat Yoga.

The Yogi must first completely master the Dream State. After that he is able to recognize the Bardo State; for this the Heat Yoga is also the best preparation. Also because of the Heat Yoga these three practices converge into the Yoga of Illusory Body.

In the art of mastering the special Transformation Yoga and the Entrance Yoga, one must first be able to gather

all the pranas into the Central Channel. Practicing Heat Yoga is the best method to accomplish this.

If he knows the different ways of allocating these teachings, he will have no difficulty in understanding the various ways of classifying them. If he possesses sound understanding of them, he may arrange them in any manner.

The Successive Steps of the Teachings in the Path