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15.] "The reason why one experiences the sensation of cold within the body (from the *Prajñāpanā Sūtra*) is that the sense of touch extends throughout the entire body. Therefore, it is reasonable that one experiences the sensation of cold within the body because the sense of touch is present both within the skin and above the empty space." The extent of the senses - except for the sense of taste, the extent (vastness = expanse) of the remaining four senses is equal to an immeasurable fraction of an angula. The extent of the sense of taste is equal to the width of an angula, but here it is important to note that the extent (expanse) of the remaining four senses, except for the sense of touch, should be understood as an *ātma-angula*. Only the extent of the sense of touch should be understood as an *utsedha-angula*.
Fourth-Fifth: How many regions and how deeply rooted? 977. [1] "So, venerable sir! How many regions is the sense of hearing said to have?" "Gautama! It is said to have infinite regions." [977-1] "Venerable sir! How many regions is the sense of hearing said to have?" [977-1] "Gautama! It is said to have infinite regions." [977-1] [2] "And so on, until the sense of touch." [977-2] 678. [1] "So, venerable sir! How many regions is the sense of hearing said to be deeply rooted in?" "Gautama! It is said to be deeply rooted in countless regions." [978-1] "Venerable sir! How many regions is the sense of hearing said to be deeply rooted in?" [978-1] "Gautama! It is said to be deeply rooted in countless regions." [978-1] [2] "And so on, until the sense of touch." [978-2] Discussion: Fourth-Fifth: How many regions and how deeply rooted? - The two present sūtras (977-978) explain which sense has how many regions and how deeply rooted it is in how many regions.
From the perspective of depth, etc., which is less extensive? 676. "So, venerable sir! In terms of the depth of the sense of hearing, the sense of taste, the sense of smell, the sense of taste, and the sense of touch, which is less extensive, which is more extensive, which is equal, and which is more extensive in a particular way?" "Gautama! In terms of depth, the sense of hearing is countless times more extensive than the sense of taste, the sense of smell is countless times more extensive than the sense of taste, the sense of taste is countless times more extensive than the sense of touch, and the sense of touch is countless times more extensive than the sense of taste." 1. *Prajñāpanā Sūtra* Malay. Vṛtti, Folio 294. 2. *Bahī*, Malay. Vṛtti, Folio 294.