Kundalini.Tantra.by.Satyananda.Saraswati

are attempting to turn the tongue up and backwards into this cavity to stimulate the flow
of nectar.
Although this fluid is known as ambrosia, it actually has a dual nature which can act
as poison as well as nectar. When it is produced in bindu and stored in lalana it remains
undifferentiated, neither poison nor nectar. As long as vishuddhi chakra remains inactive,
this fluid runs downward unimpeded, to be consumed in the fire of manipura, resulting in
the processes of decay, degeneration and finally death in the body's tissues.
However, by certain practices such as khechari mudra, the ambrosia is secreted from
lalana and passes to vishuddhi chakra, the purifying and refining center. When vishuddhi
is awakened the divine fluid is retained and utilized, becoming the nectar of immortality.
The secret of youth and regeneration of the body lies in the awakening of vishuddhi
chakra.
There is a wonderful story from the mythology of India which concerns the nectar
and poison of vishuddhi. It is said that in the primordial past, the devas and the rakshasas,
symbolizing the forces of good and evil, were continually fighting each other. Each was
seeking to dominate and destroy the other. Eventually Vishnu attempted to resolve the
conflict. He suggested they stir up the primordial ocean (representing the world and the
mind), and said they could divide the contents equally between them.
This seemed a fair solution and Vishnu's plan was agreed upon. The ocean was
churned and many things came to the surface for sharing and distribution between the
devas and rakshasas. In all, fourteen things arose, including the nectar of immortality side
by side with the worst poison. Of course both the devas and the rakshasas wanted the
nectar, but nobody wanted anything to do with the poison. Ultimately only the devas got
the nectar, because if it had been given to the vicious rakshasas they would have become
immortal. The poison could not even be discarded, for wherever it was thrown it would
cause harm. A great dilemma arose and eventually Vishnu took the poison to Shiva to ask
his advice. Shiva swallowed the poison in a single gulp. From that time onwards, one of
the names of Lord Shiva has been Nilakantha, the blue-throated one, and he is often
depicted in this way.
This story signifies that even poison can be readily digested when vishuddhi chakra is
awakened. It means that at higher levels of awareness, at the level of vishuddhi and
above, even the poisonous and negative aspects of existence become integrated into the
total scheme of being. They are rendered powerless as concepts of good and bad fall
away. At this state of awareness the poisonous aspects and experiences of life are
absorbed and transformed into a state of bliss.
In this chakra it is possible that not only internal poisons but also external poisons
can be neutralized and rendered ineffective. This is one of the siddhis associated with
vishuddhi chakra, and many yogis have possessed this power. It depends on the
awakening of the throat center and bindu visarga in the brain, to which it is directly
connected.