Sanskrit. "Absolute Necessity" (to overcome the inertia of the human organism). One of the four Yogas mentioned in the Upanisads (Mantra, Raja, Laya). Symbolically, it is the "union" (Yoga) of the "Sun" (Ha) with the "Moon," (Tha) and thus dissolving the polar opposites through the interface of Mind-Body.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...