Buddha Abhidhamma - Ultimate Science - BuddhaNet

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v Asa¤¤àsatta brahmas are born with jãvita-navaka-kalàpa
råpa.
5 âkàsàna¤càyatana-brahmas are born with àkàsàna¤càyatana-vipàka
citta,
Vi¤¤àna¤càyatana-brahmas are born with vi¤¤àna¤càyatana-vipàka
citta,
âki¤ca¤¤àyatana-brahmas are born with àki¤ca¤¤àyatanavipàka
citta, and
N’evasa¤¤à-n’àsa¤¤àyatana-brahmas are born with
n’evasa¤¤à-n’àsa¤¤àyatana-vipàka citta.
The Method of Naming Råpa-planes
The reason for some disagreement in the names of the råpaplanes
and the rebirth consciousness of brahmas is that there
are two ways of counting råpa-jhànas.
For persons of slow wisdom, after attaining the first
råpàvacara jhàna, they have to eliminate the jhàna factors one by
one in going up to the higher jhànas. Thus, for this type of person,
there are five råpàvacara jhànas.
For persons of quick wisdom, after attaining the first jhàna,
they eliminate vitakka and vicàra together in going to the second
jhàna. Thus their second jhàna is equivalent to the third jhàna of
the slow-wisdom people, and their fourth jhàna is equivalent to
the fifth jhàna of the slow-wisdom people.
So there are only four råpàvacara jhànas for quick-wisdom
people.
In practice, as is observed in International Buddha Sàsana
Centres (Pa-auk Meditation Centres), almost all people eliminate
vitakka and vicàra together. Hence the method of counting
råpàvacara jhànas up to the fourth level is the more common