IN and YO are concepts of duality in Japanese energy and Reiki study. They are similar to the more familiar Chinese concepts of YANG and YIN – which we see as something having a feminine or masculine nature or attributes. In Japanese understanding of duality however, everything has both. IN and YO are two sides of the same coin, more like inner and outer or right and left. We often want to believe they are two different “things” when in truth there is one orginal energy. Electricity is electricity. It has both a positive and negative charge, but the two together are electricity. There is only one energy. Similarly there is IN and YO to everything. Light and dark, hot and cold are two examples of common dualities found in nature. Let’s look at the Reiki Precepts to see how this understanding works in them.
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