The issue is that any school which receive funds from the federal government cannot promote the ideology or practice of a religion per the separation and establishment clauses of Constitution. An examination of the yoga instruction books reveals the problem. Yoga in its pure form embodies and teaches timeless truths. It is a universal philosophy. The author goes on to say that our minds must be changed into an Eastern process as opposed to Western rationality.
Yoga is a mental as well as a physical practice.
Yoga is an inherent and inextricable part of the belief and practice of Hinduism . These descriptions all point to the underlying concepts of yoga - yoga is a means of achieving union with the inner True Self, the God within. Various are the ways Karma yoga, bhakti yoga, jnan yoga, raja yoga, laya yoga, Kundalini yoga. Included in the discussion of Kundalini yoga are hatha yoga. All the paths lead to the same height.