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Karmagrantha Part Four
(1) The external shape is called 'Bahyanivritti' and (2) the internal shape is called 'Abhyantar Nivritti'. The external part is like a sword and the internal part is like the sharp edge of a sword, which is made of extremely pure atoms. This pudgala form of Abhyantar Nivritti is according to the Prajnapana Sutra - Indriyapadaki Tika 026. In Acharangiti Griha 104, its form is described as chetanmaya.
Regarding shape, it should be known that the shape of the skin is of many types, but there is no separation between its external and internal shape. Whatever the external shape of the skin of a creature, so is its internal shape. But this is not the case with other senses: except for the skin, the internal shape of all other senses does not match the external shape. The internal shapes of the same type of senses of all types of creatures are considered to be of one kind. For example: the internal shape of the ear is like a Kadamba flower, the eye is like a lentil seed, the nose is like a flower of Ati Mukta, and the tongue is like a knife. But the external shape is seen to be different in all species. For example: look at the ears, eyes, nose, and tongue of humans, elephants, horses, bulls, cats, rats, etc.
(b) The subject-grasping power of Abhyantar Nivritti is called 'Upakaranendriya'. (2) Bhavaendriya is of two types: - (1) Labdhirupa and (2) Upayogarupa. (1) The ability-speciality of the power of knowing the destruction of Matijnana Avarana is called 'Labdhirupa Bhavaendriya'. (2) According to this Labdhirupa Bhavaendriya, the tendency of the soul to grasp the object is called 'Upayogarupa Bhavaendriya'.
To know this subject in detail, one should see Prajnapana-Pad 15, page 263/ Tattvarth Adhyay 2, Sutra 17-18 and Vritti, Visheshav, Ga 26632003 and Lokaprakash-Sarg 3 Shlok 464 onwards.