The different cittas accompanied by piti:
Four types of lobha-mula-citta are accompanied by piti, namely the types
which are accompanied by somanassa. Two types of ahetuka citta are accompanied
by piti, the santirana-citta which is kusala vipaka and which investigates
an extraordinarily pleasant object and the hasituppada-citta, the smile-producing
ahetuka-kiriyacitta of the arahat. Moreover, piti accompanies four types
of mana-kusala cittas, four types of maha-vipakacittas and four types of
maha-kiriyacittas, thus, twelve types of kammavacara sobhana cittas. As
regards jhanacittas, piti accompanies the rupavacara kusala cittas, the
rupavacara vipakacittas and the rupavacara kiriyacittas of the first three
stages of jhana ( of the five-fold system), thus, nine types of rupavacara
cittas. When lokuttara jhanacittas, lokuttara cittas accompanied by jhana-factors
of the different stages of jhana, are taken into account, lokuttara citta
are classified as forty. Since piti does not arise in the fourth and fifth
stage of jhana, only the lokuttara cittas arising with jhana factors of
three stages of jhana are accompanied by piti. Thus, twenty-four types
of lokuttara cittas in all (three times eight) are accompanied by piti.
If we count cittas as hundred-and-twentyone (including forty lokuttara
cittas), the cittas accompanied by piti are summarized as follows:
4 akusala
cittas
2 ahetuka cittas
12 kamavacara sobhana
cittas
9 rupavacara cittas
24 lokuttata cittas
-altogether : 51 cittas