Buddha Abhidhamma - Ultimate Science - BuddhaNet

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Pañca-dvàràvajjana citta works like a wave-length selector of a radio.
Because of it, we can take note of the senses one after one.
When the sense or thought-object appears at the mind-door,
it is mano-dvàràvajjana which adverts consciousness towards the
sense.
Hasituppàda-citta can arise only in Buddha and arahats when
they smile. Note that it is accompanied by joy whereas the two
avajjana cittas are accompanied by neutral feeling.
Kàma-sobhaõa Cittas
(Beautiful Consciousness of the Sense Sphere)
There are 24 kàma-sobhaõa cittas. They are divided into three
classes:
1 Mahà-kusala cittas
great moral consciousness – 8
2 Mahà-vipàka cittas
great resultant consciousness – 8
3 Mahà-kiriya cittas
great functional consciousness – 8
Here ‘mahà’ – ‘great’ means ‘greater in number’. Mahà-kusala
citta is also known as kàmàvacara-kusala citta. As there are 8
kàmàvacara-kusala cittas, 5 råpàvacara-kusala cittas, 4 aråpàvacarakusala
cittas and 4 lokuttara (supramundane) kusala cittas, the
number of kàmàvacara-kusala cittas is greatest. The same is true
for mahà-vipàka cittas (also known as kàmàvacara-vipàka cittas) and
mahà-kiriya cittas (kàmàvacara-kiriya cittas). ‘Sobhaõa – beautiful’
implies that sobhaõa cittas yield good qualities and they are
connected with wholesome roots such as alobha (generosity), adosa
(goodwill) and amoha (knowledge).