If you can control the Prana you can completely control all the forces of the Universe, mental and physical. The Yogi can also control the Omnipresent manifesting power out of which all energies take their origin, whether concerning magnetism, electricity, gravitation, cohesion, nerve-currents, vital forces or thought-vibrations, in fact the total forces of the Universe, physical and mental. *
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Two Vayus (air) : Prana (sun-inhale) and Apana (moon-exhale)
 Astrologically
Sun = life spirit, ego, the conscious
Moon= soul, instinct, emotions, the unconscious.

Astrology is the study of the relationship between the macro and microcosmos.  Hermetic law of correspondence states, “As above, so below, as within, so without.”  As vast as the numbers of stars in the sky, are the number of atoms in our bodies.  Concentrate and focus on the manifesting power you hold in each thought and breath and use them wisely.

“You will know… when you are calm, at peace, passive. A Jedi uses the Force for knowledge and defense, never for attack. ”  ~Yoda

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The sage has the sun and moon by his side and the universe under his arm.
He blends everything into a harmonious whole.  ~Chuang Tzu
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The study of traditional Chinese medicine centers on the concept of the vital force or Qi as being not only within the human body, but in all living things. This Qi flows through the meridians of the human body to exchange, via the acupuncture points, with the Qi in the environment. Thus, the Qi of humans (the human energy field or HEF), and all living things, the earth,and the unified field are constantly exchanging. **

*source:   http://www.yoga-age.com/asanas/prana.html
**source:  http://twm.co.nz/energy2.html