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correct path, removing any confusion, misunderstanding and excessive intellectual contemplation.
The first books to refer to yoga were the ancient Tantras and later the Vedas which were written about the time the Indus Valley culture was flourishing. Although they do not give specific practices, they allude to yoga symbolically. In fact, the verses of the Vedas were heard by the rishis, seers, in states of deep, yogic meditation or samadhi, and are regarded as revealed scriptures. It is, however, in the Upanishads that yoga begins to take a more definable shape. These scriptures collectively form Vedanta, the culmination of the Vedas, and are said to contain the essence of the Vedas.
Sage Patanjali's treatise on raja yoga, the Yoga Sutras, codified the first definitive, unified and comprehensive system of yoga. Often called the eight-fold path, it is comprised of yama, self-restraints, niyama, self-observances, asana, pranayama, pratyahara, disassociation of consciousness from the outside environment, dharana, concentration, dhyana, meditation and samadhi, identification with pure consciousness.
In the 6th century BC, Lord Buddha's influence brought the ideals of meditation, ethics and morality to the fore and the preparatory practices of yoga were ignored. However, Indian thinkers soon realised the limitations of this view. The yogi Matsyendranath taught that before taking to the practices of meditation, the body and its elements need purifying. He founded the Nath cult and the yogic pose matsyendrasana was named after him. His chief disciple, Gorakhnath, wrote books on hatha yoga in the local dialect and in Hindi.
Indian tradition previously required that original texts be written in Sanskrit. In some cases they clothed their writings in symbolism so that only those prepared and ready for a teaching would be able to understand it. One of the most outstanding authorities on hatha yoga, Swami Swatmarama, wrote the Hatha Yoga Pradipika, or 'Light on Yoga', in Sanskrit, collating all extant material on the subject. In doing so, he reduced the emphasis on yama and niyama from hatha yoga, thereby eliminating a great obstacle experienced by many beginners. In the Hatha Yoga Pradipika, Swatmarama starts