Yoga is also the union of the inner and outer methods for reaching total purity. This union depends upon the connection between our physical outer body and our spiritual inner body.

Our entire being is like the layers of an onion. The outermost layer is the gross physical body. The next layer down is what feeds this layer, the breath being our most important “food.” This breath layer is linked to a layer of subtle physical energy called prana, or the “inner winds.”

These winds flow throughout our body in the next layer, a network of tiny tubes or channels more subtle than the finest light. Upon the winds in these channels ride our thoughts themselves, the innermost layer, like a rider atop a horse: the amazing frontier where mind and body meet.

In a negative way, problems at one layer of this onion affect all the others. If our thoughts are unstable, this disturbs the inner winds upon which they ride. This then disturbs the breath, and causes nervousness and shaking.

This ultimately causes physical ailments like ulcers or heart problems, which again sets off unhappy thoughts—a continuous downward spiral. The outer exercises and inner meditations of yoga reverse this cycle.