On the Symmetrical Logic and Asymmetrical Causality of Samsara and Nirvana

In verses 19 and 20 of the Mūlamadhyamakakārikā in the chapter analyzing Nirvana, Nāgārjuna states that "There is no distinction whatsoever between samsara and nirvana. There is no distinction whatsoever between nirvana and samsara. What is the limit of nirvana, that is the limit of samsara. There is not even the finest gap to be …