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The specific natures of the senses are the *nirvutti-dravyaindriya*. The *nirvutti-dravyaindriya* has external and internal *pudgalik* power, without which knowledge is not possible even if the nature exists; that instrument is the *dravyaindriya*. The *bhaavendriya* is also of two types, acquisition and use.47 The special power of the soul that is obtained from the destruction and pacification of *jnaanavaranakarma* etc. is acquisition. When acquisition is obtained, the soul performs a special type of business, that business is use. The first motivator has twenty-four doors and the second has twelve doors. The senses have been discussed in twenty-four *dandakas*. In living beings, the *avagrahan-paricched*, *avaay*, *eeha*, and *avagraha-artha* and *vyanjan* have been described in twenty-four *dandakas* in both ways. Except for the eye sense, the remaining four senses have *vyanjanavagraha*. The *arthaavagraha* is of six types. It happens through the five senses and also through the sixth sense, the mind. Thus, the senses have been divided into two categories: *dravyaindriya* and *bhaavendriya*. The *dravyaindriya* is material in nature because it is *pudgalajanya*, and the *bhaavendriya* is knowledge-like. Therefore, it is synonymous with the power of consciousness. The *dravyaindriya* is obtained from the rise of *angopanga* and *nirmanakarma*. The shape of the senses is called *nirvutti*. That *nirvutti* is also of two types: external and internal. The external shape of the sense is called *baahyanirvutti*, and the internal nature is called *praabhyantaranirvutti*. The external part is like a sword, and the internal part is like the sharp edge of a sword, which is made of very pure atoms. In the commentary of *Prajnaapana*, the nature of *praabhyantaranirvutti* is described as *pudgalmaya*.48 But in the *Aachaaraanga-vritti*, its nature is described as *chetanmaya*.149 Here it must be remembered that the nature of the skin is of various types, but there is no separation in its external and internal shape. The external shape of the animal's skin is the same as its internal shape, but this is not the case with the other four senses. Their external shape is different, and their internal shape is different. For example, the internal shape of the ear is like a *kadambapushpa*. The internal shape of the eye is like a lentil seed, and the internal shape of the nose is like a *pratimuktak* flower, and the shape of the tongue is like a knife. But the external shape is visible in all of them. For example, we can see the ears, eyes, nose, and tongue of humans, elephants, horses, birds, etc. The power of the *praabhyantaranirvutti* to grasp the object is the *upakaranaindriya*. The *Tattvarthasutra*, 50 *Visheshaavashakabhaashya*,51 *Lokaprakash*, 52 and other texts have discussed the senses in detail. In *Prajnaapana*, the *dravyaindriya* and *bhaavendriya* have been discussed in twenty-four *dandakas* through the doors of *indriyopachay*, *indriyanirvartan*, *indriyalabdhi*, *indriyopयोग* etc. 147. *Labdhyupyogau bhaavendriyam* / *Tattvarthasutra* 2/18 148 *Prajnaapanasutra*, *Indriyapad*, Commentary page 294/1 149. *Praachaaraangavritti*, page 104 150. *Tattvarthasutra*, Chapter 2, Sutra 17/18 and various commentaries 151. *Visheshaavashakabhaashya*, Verse 2993-3003 152. *Lokaprakash*, Canto 3, Verse 464 onwards