YOGA
The word Yoga comes from the Sanskrit word 'yuj' meaning to yoke, join or unite.
It is a philosophical science of self - realization and transformation, independently guiding one into recognizing his fullest potential and purpose in life (Essence of spirit).
The origin of yoga pre-dates Indian Hindu and Buddhist religions and in that context, Yoga is not a religion.
In Yogic philosophy we have three bodies; the Physical, Subtle (astral) and Causal (spirit), which is the path to the integration of self or "self realization".