Kundalini.Tantra.by.Satyananda.Saraswati

In molecular biology, the essence of bindu can be found in the DNA and RNA
molecules, each one of which contains the complete genetic blueprint for the entire
organism. This is another illustration of the great intelligence and potential which can be
condensed and expressed in the confines of a tiny point. In fact, the deeper science delves
into nature and the structure of the universe, the greater the power and complexity it
uncovers. Within the tiny dimensions of these points vast potentials of meaning are
contained.
The power of the point or bindu has been known to mystics throughout the history of
mankind. In tantra, each bindu, each particle of manifested existence is regarded as a
center of power or shakti. This shakti is an expression of the underlying substratum of
static consciousness. The aim of the tantric system is to bring about a fusion of Shakti -
the individual manifested power, with Shiva - the inert, underlying universal
consciousness.
The red and white bindu
The bindu is the cosmic seed from which all things manifest and grow. It is often
related to male sperm because from the tiny bindu of a single spermatozoon, joined with
the minute female ovum, a new life grows. The act of conception is a perfect symbol of
the principle of the bindu. In fact, bindu is explained in these terms in many of the texts
of tantric kundalini yoga. In the Yogachudamani Upanishad it says:
"The bindu is of two types, white and red. The white is shukla (sperm) and the red is
maharaj (menses)."
(verse 60)
Here the white bindu symbolizes Shiva, purusha or consciousness, and the red bindu
symbolizes Shakti, prakriti or the power of manifestation. The white bindu lies in the
bindu visarga and the red bindu is seated in mooladhara chakra. The purpose of tantra and
yoga is to unite these two principles so that Shiva and Shakti become one. The text
continues:
"The red bindu is established in the sun; the white bindu in the moon. Their union is
difficult."
(verse 61)
The sun represents pingala nadi and the moon represents ida. The two bindus
symbolize the merging of the world of opposites, in terms of male and female. Out of
their union results the ascent of kundalini.