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... From Radrengpa Shākya Sonam (rwa sgreng pa shAkya bsod nams, b.1357?), a disciple of the great Ngulchu Tokme Zangpo (dngul chu thogs med bzang po, 1297-1371), he received several teachings on mind training, including the master's own composition entitled The Flowing River of Bodhicitta (byang sems chu rgyun). ...
Read more from the biography of Ga Rabjampa Kunga Yeshe