The Tibetan traditions generally divide the primary modes of exegesis on the Ratnagotravibhāga
into two lines of transmission known as the analytic tradition (thos bsam gyi lugs
) and the meditative tradition (sgom lugs
). These two traditions originated with the Tibetan disciples of the Kashmiri master Sajjana—namely, Ngok Lotsāwa and Tsen Khawoche, respectively. Therefore, these two are also commonly referred to as the Ngok tradition (rngog lugs
), representing the scholarly or analytic approach, and the Tsen tradition (btsan lug
s), representing the more practice-oriented meditative approach. Alternatively, Jamgön Kongtrul, in his encyclopedic work commonly known as the Treasury of Knowledge
, refers to Ngok's tradition as "the oral transmission of exposition" (bshad pa'i bka' babs
) and Tsen’s tradition as "the oral transmission of practice" (sgrub pa'i bka' babs
). Though it is likely the diverging motivations of these two figures in requesting these teachings from their mutual teacher that would set these traditions on their respective trajectories.
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