The term 'Half a Cosmic Whole' can be broken down into two parts: Yin (3 letters) and the rest of the phrase. Yin is one of the two complementary forces in Chinese philosophy, the other being Yang. Together, Yin and Yang represent the duality of the universe, with Yin representing the feminine, dark, and passive aspects of life, and Yang representing the masculine, light, and active aspects. The phrase 'Half a Cosmic Whole' thus refers to the idea that Yin and Yang are two halves of a greater cosmic whole, and that each is necessary for the other to exist.