The Yoga System of Patanjali (New ed)

Of the ancient philosophies the dualism called Sankhya, the monism of the Vedanta and the Yoga system.

Kauntiya mentions Sankhya and Yoga as current in his day.

But the elements of yoga, rigorous austerities and control of the senses are one of the oldest discipline in ancient beliefs to attain shakti and spiritual power.

The author's work continues in the tradition of austere scholarship.