The origin is the Sanskrit word Yog meaning union. Yoga is a union of the organ systems in the body with the consciousness in the mind. Philosophically, yoga produces a union of body, mind, and energy (or soul or spirit) to bring about a state of equanimity (calmness). Progressing to an even more advanced state, blending science and philosophy, one experiences a union of body, mind, internal energy, and the all-pervading cosmic energy, resulting in better physical health, mental control, and, ultimately, self-realization.