Four absorbed concentrations focused on voidness (emptiness) for gaining a state of nirvana: (1) lack of hope, (3) lack of a sign (3) lack of an action's affecting variables and (4) voidness.
Tibetan: རྣམ་པར་ཐར་པའི་སྒོ་བཞི། rnam-par thar-pa'i sgo-bzhi
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