We should ideally do our morning gymnastic and breathing exercises every day in nature so as to benefit from the purest air possible, since it’s from the air that we can harness this precious quintessence the Indian yogis called prana. Prana is life energy that exists everywhere, in the earth, in water, air and fire, but it is mainly carried by the sun’s rays, and is most abundant in the early morning. Each particle of this prana is like a drop of crystalline water, a tiny, suspended sphere of light filled with a spiritual essence. And we can capture some of these drops of light through our breathing.
By consciously passing the air through our nostrils, we set our subtle centres in motion and they work to extract the quintessence from the air. Once it has been captured, this quintessence circulates; it is like fire running through the network of nerves on either side of our spine. Just as blood circulates though veins, arteries and capillaries, prana circulates throughout our nervous system. Not only does our physical health depend on our nervous system, but so do the development of our spiritual faculties and the awakening of our chakras.
Omraam Mikhael Aivanhov Daily Meditations