Who thinks now, if there is no Self? We have seen earlier that it is the thought that thinks, that there is no thinker behind the thought. In the same way, it is wisdom (paññā), realization, that realizes. There is no other self behind the realization. In the discussion of the origin of dukkha we saw that whatever it may be—whether being, or thing, or system—if it is of the nature of arising, it has within itself the nature, the germ, of its cessation, its destruction. Now dukkha, saṃsāra, the cycle of continuity, is of the nature of arising; it must also be of the nature of cessation. Dukkha arises because of ‘thirst’ (taṇhā), and it ceases because of wisdom (paññā). ‘Thirst’ and wisdom are both within the Five Aggregates.