The place in the _Vyāsa-bhāshya_ which refers to this genesis is that under _viśeshāviśeshaliṅgamātrāliṅgāni guṇaparvāṇi_, II. 19. There it says that the four bhūtas are ether, air, fire, water and earth. These are the viśeshas (specialised modifications) of the unspecialised modifications the tanmātras of sound, touch, colour, taste and smell. So also are the cognitive senses of hearing, touch, eye, tongue, and nose and the conative senses of speech, hand, feet, anus and the generative organ. The eleventh one manas (the co-ordinating organ) has for its object the objects of all the above ten senses. So these are the specialised modifications (_viśeshas_) of the unspecialised (aviśesha) asmitā. The guṇas have these sixteen kinds of specialised modifications (_viśeshapariṇāma_). The six unspecialised modifications are the sound tanmātra, touch tanmātra, colour tanmātra, taste tanmātra and smell tanmātra. These tanmātras respectively contain one, two, three, four, and five special characteristics. The sixth unspecialised modification is asmitāmātra. These are the six aviśesha evolutions of the pure being, the mahat. The category of mahat is merely a sign beyond the aviśeshas and it is there that these exist and develop. In this _Vyāsa-bhāshya_ the fully specialised ones, viśeshas, the grosser elements are said to have been derived from the tanmātras and the senses and manas, the faculty of reflection are said to have been specialised from the ego or asmitā. The tanmātras, however, have not been derived from the ego or asmitā here. But they together with asmitā are spoken of as the six slightly specialised ones, the five being the five tanmātras and the sixth one being the ego. These six aviśeshas are the specialisations of the mahat, the great egohood of pure Be-ness. It therefore appears that the six aviśeshas are directly derived from the mahat, after which the ego develops into the eleven senses and the tanmātras into the five gross elements in three different lines. But let us see how _Yoga-vārttika_ explains the point here:—