The Power of the Serpent
The yogi who has attained complete mastery over the technique of breathing and who has been able by this means to isolate himself totally from the external world, succeeds in "seeing" the interior of his body or, in other words acquires intuitive knowledge of the secret mandala that his subtle body forms. Having unraveled the tangled web of the nadis, he reaches the end of initiation and penetrates to the most inward part of himself, at the base of the trunk, where there is a cave located at the foot of the cosmic mountain. In this cave the yogi perceives three things: a fire of glowing embers, a sleeping serpent, and the threefold orifice of the three principal channels, the ida, the pingala, and the sushuma:
