TAO is the “Maximum”, the “Sense”, is the indivisible unity, what exists. YIN and YANG are two complementary opposing forces that depend on each other and interact with the ever-changing and changing natural elements. They describe conditions or circumstances conditioned by space and time in the visible and indivisible world.
With YIN and YANG there is the possibility of contemplating and describing energetic situations. The fundamental idea of everything is the idea of change. In YIN, the female principle, there is the tendency towards YANG and in YANG, the masculine principle, there is the change towards YIN.
This is described by the philosopher LAO ZI (Laotse) as the “SENSE” Kungtse Judgment: everything is in flux, like a river, without stopping, day and night. Thus was born the fundamental idea of the change of the contrast.