But karma is not in fact a material accumulation, and does not depend on externals; rather its power to condition us depends on the obstacles that impede our knowledge. If we compare our karma and the ignorance that creates it to a dark room, knowledge of the primordial state would be like a lamp, which, when lit in the room, at once causes the darkness to disappear, enlightening everything. In the same way, if one has the presence of the primordial state, one can overcome all hindrances in an instant.