with the experience of bliss, brightness and non-thought, he may either follow the foregoing instructions or absorb himself in his Samadhi to reach the state of Sleeping Samadhi. Some people say that if one has attained a stable Samadhi of any general type it is not necessary for one to lead the prana entering into the Central Channel. This is not correct, for doing so will not bring about the actual Sleeping-Light of Anuttara Tantra. Nevertheless, if the yogi concentrates at the Heart-Center, through the power of the habitual thought produced by the practice he may well bring about the fruit. Though through the power of any general Dhyana one may induce a certain sleeping samadhi with the capability of contemplating on the Soleness and the Light of the general Paths (Hinayana and Mahayana Path), that is by no means the Light as taught by the teaching of Anuttara Tantra [**].

Recognizing the Light through the prana power by concentrating on the Heart Center will cause the Four Voidnesses to successively arise; the manner of their emergence is explained as follows:

Meditating upon a Thig-le in the Heart Center at the deep-sleeping state in the preparatory stage will cause a perfect Light-of-No-Thought to emerge. Even if it does not emerge and the yogi falls asleep, his prana will naturally gather in the Central Channel. As instructed before, if one