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The Sixth Karma Grantha should be understood in the same way regarding the concept of 'udaya' (arising). The reason for the binding or arising of one at a time is their mutually contradictory nature, but both natures can exist simultaneously. There is no contradiction in the simultaneous existence of both. However, there is a special feature that Agni Kayik and Vayu Kayik beings also experience 'udvalana' (elevation) of the higher 'gotra' (lineage). Therefore, these beings who experience 'udvalana', or when these beings are born in other 'ekendriya' (one-sense) etc., only the lower 'gotra' exists for some time. After that, when the higher 'gotra' is bound, both exist. Even the 'ayogikevali' (non-liberated) beings experience the decay of the lower 'gotra' in their final moments, at which time only the higher 'gotra' exists.
The summary of the above statement regarding the binding, arising, and existence of 'gotra karma' in relation to the 'sthana' (place) is that the binding 'sthana' of 'gotra karma' is also one 'prakriti' (nature), the arising 'sthana' is also one 'prakriti', but the existence 'sthana' is both two 'prakriti' and one 'prakriti'.
1. 'Nīcuccāṇega daram bandhudaya hoti sambhavattāṇe |
Bosattā jogitti ya carime ucca have sattāṃ ||' (Go. Karmakar, Gāyā 135)
2. 'Uccuvellidateka vāummi maṇīvameva sattāṃ tu |
Sesigiviale sayale nīcaṃ ca dugaṃ ca sattāṃ tu ||' (Go. Karmakar, Gāyā 336, 637, 3)
3. 'Ujy uvellidateka vāū sesey vaielasayalesu |
Sappannapadhamakale pīcaṃ evaṃ have sattāṃ ||' (Go. Karmakar, Gāyā 336, 637, 3)
Also, in general, the binding 'sthana' of 'gotra' is either the higher 'gotra' or the lower 'gotra', ... because of the mutual contradiction of the two, they cannot exist simultaneously. The arising 'sthana' is also one, and that too is one of the two, because of the mutual contradiction of the two, they cannot arise simultaneously.