Kriya-Yoga" in the Youpi-Sutra
ON THE "KRIYA-YOGA" IN THE YOUPI-SUTRA By Shingen TAKAGI The Yogasutra (YS.) defines that yoga is suppression of the activity of mind in its beginning. The Yogabhasya (YBh.) by Vyasa, the oldest (1) commentary on this sutra says "yoga is concentration (samadhi)". Now- here in the sutra itself yoga is not used as a synonym of samadhi. On the other hand, Nyayasutra (NS.) 4, 2, 38 says of "the practice of a spe- cial kind of concentration" in connection with realizing the cognition of truth, and also NS. 4, 2, 42 says that the practice of yoga should be done in a quiet places such as forest, a natural cave, or river side. According NS. 4, 2, 46, the atman can be purified through abstention (yama), obser- vance (niyama), through yoga and the means of internal exercise. It can be surmised that the author of NS. also used the two terms samadhi and yoga as synonyms, since it speaks of a special kind of concentration on one hand, and practice of yoga on the other. In the Nyayabhasya (NBh. ed. NS. 4, 2, 46), the author says that the method of interior exercise should be understood by the Yogasastra, enumerating austerity (tapas), regulation of breath (pranayama), withdrawal of the senses (pratyahara), contem- plation (dhyana) and fixed-attention (dharana). He gives the practice of yoga (yogacara) as another method. It seems, through NS. 4, 2, 46 as mentioned above, that Vatsyayana regarded yama, niyama, tapas, prana- yama, pratyahara, dhyana, dharana and yogacara as the eight aids to the yoga.
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