When you experience everything as oneness in your consciousness, then you are in yoga. To attain that unity within you, there are many ways. You work with the body, then you move to the breath, then to the mind, then to the inner self. Like this, many steps have been created, but they are only different facets of yoga. It is important that all of them are addressed in a very balanced way, all at once, as one single unit. There is really no division as such; yoga employs all aspects of who you are.