Breath and the Four Elements

Did you know that different breaths relate to the different elements?

To purify the Earth element in you body, breath in through the nose and out through the nose
To purify the Water element in your body, breathe in through the nose and out through the mouth.
To purify the Fire element in your body, breathe in through the mouth and out through the nose
To purify the Air element in your body, breathe in through the mouth and out through the mouth.