Buddha Abhidhamma - Ultimate Science - BuddhaNet

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1 Aråpàvacara kusala cittas – 4
aråpa-jhàna (moral consciousness)
2 Aråpàvacara vipàka cittas – 4
aråpa-jhàna (resultant consciousness)
3 Aråpàvacara kiriya cittas – 4
aråpa-jhàna (functional consciousness)
The four aråpàvacara kusala cittas may be acquired by persons
who are not yet arahats whereas the four aråpàvacara kiriya cittas
can arise only in arahats. These two types of aråpàvacara cittas are
experienced in the sense sphere as well as in the immaterial sphere.
The four aråpàvacara vipàka cittas are experienced in the
immaterial-sphere only. They are the kamma-resultants of
aråpàvacara kusala cittas. A person who acquires aråpa-jhàna and
maintains it till his death will be reborn in the immaterial sphere.
Aråpa Jhànas
The person who has developed the five råpa-jhànas may go up
the ladder of concentration to aråpa-jhànas. In doing so he uses
the concentration associated with fifth råpa-jhàna as his base.
Also he has to reason about the unsatisfactoriness of the
physical body and the troubles it develops on account of heat and
cold, insect-bites, hunger and thirst, diseases, old age and death.
When he feels detached from the physical body and råpa, he
first develops the fifth jhàna by meditating on the pañibhàga-nimitta
of pañhavã-kasiõa. He then comes out from the fifth jhàna and, though
the pañibhàga-nimitta exists in his vision, he neglects it and tries to
concentrate on the infinite space (àkàsa) beyond it and meditates
“àkàsa, àkàsa” repeatedly.