Buddha Abhidhamma - Ultimate Science - BuddhaNet

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sacca, (5) the past khandha- and àyatana-groups, (6) the future
khandha- and àyatana-groups, (7) the front end and the rear end
of the present khandha- and àyatana groups, and (8) Pañiccasamuppàda
causal relations which include kamma and its
consequences.
Saïkhàra means rebirth-producing volitions (cetanà) or
kamma-formations. It refers to pu¤¤àbhisaïkhàra, apu¤¤àbhisaïkhàra
and anenjàbhisaïkhàra.
1 Pu¤¤àbhisaïkhàra represents the 13 cetanàs (volitions)
present in 8 mahà-kusala cittas and 5 råpàvacara-kusala
cittas. It is so called because it conditions good vipàkanàmakkhandha
and kañattà-råpa to arise in Kàma-loka and
Råpa-loka.
2 Apu¤¤àbhisaïkhàra represents the 12 cetanàs present in
12 akusala cittas. It is so called because it conditions bad
vipàka-nàmakkhandha and kañattà-råpa to arise in the four
Apàya abodes.
3 Anenjàbhisaïkhàra represents the 4 cetanàs present in 4
aråpàvacara-kusala cittas. It is so called because it
conditions the arising of unshakable aråpa existence.
In short, saïkhàra represents the 29 types of kamma
associated with 17 lokiya kusala cittas and 12 akusala cittas.
How does avijjà condition saïkhàra? Because of ignorance
about kamma and its effect, people commit immoral actions for
immediate self-benefit. Because of the delusion thinking that
sensual pleasure and jhàna-ecstasy are real forms of happiness,
people perform dàna, sãla and bhàvanà in order to attain such
happiness either in the present life or in future lives. Thus
people accumulate both moral and immoral kammas (saïkhàra)
as the result of ignorance or delusion (avijjà).