[Footnote 1: Vâtsyâyana, however, in his bhâ@sya on _Nyâya sûtra_, I. i 29, distinguishes Sâ@mkhya from Yoga in the following way: The Sâ@mkhya holds that nothing can come into being nor be destroyed, there cannot be any change in the pure intelligence (_niratis'ayâ@h cetanâ@h_). All changes are due to changes in the body, the senses, the manas and the objects. Yoga holds that all creation is due to the karma of the puru@sa. Do@sas (passions) and the prav@rtti (action) are the cause of karma. The intelligences or souls (cetana) are associated with qualities. Non being can come into being and what is produced may be destroyed. The last view is indeed quite different from the Yoga of _Vyâsabhâ@sya,_ It is closer to Nyâya in its doctrines. If Vâtsyâyana's statement is correct, it would appear that the doctrine of there being a moral purpose in creation was borrowed by Sâ@mkhya from Yoga. Udyotakara's remarks on the same sûtra do not indicate a difference but an agreement between Sâ@mkhya and Yoga on the doctrine of the _indriyas_ being "_abhautika._" Curiously enough Vâtsyâyana quotes a passage from _Vyâsabhâ@sya,_ III. 13, in his bhâ@sya, I. ii. 6, and criticizes it as self-contradictory (_viruddha_).] 229 S'aivas and S'@aktas and assumed a peculiar form as the Mantrayoga; they grew in another direction as the Ha@thayoga which was supposed to produce mystic and magical feats through constant practices of elaborate nervous exercises, which were also associated with healing and other supernatural powers. The Yogatattva Upani@sad says that there are four kinds of yoga, the Mantra Yoga, Laya Yoga, Ha@thayoga and Râjayoga [Footnote ref 1]. In some cases we find that there was a great attempt even to associate Vedântism with these mystic practices. The influence of these practices in the development of Tantra and other modes of worship was also very great, but we have to leave out these from our present consideration as they have little philosophic importance and as they are not connected with our present endeavour.