Buddha Abhidhamma - Ultimate Science - BuddhaNet

Chapter 1
CITTA
Consciousness
Four Classes of Cittas
“Citta” is defined as ‘consciousness of the senses’ or ‘awareness
of an object’.
Cittas may be divided into four classes in accordance with
the four planes (bhåmi) or spheres (avacara):
1 Kàmàvacara cittas
consciousness mostly experienced in the sense sphere
(kàma-loka)
2 Råpàvacara cittas
consciousness mostly experienced in the fine-material
sphere (råpa-loka)
3 Aråpàvacara cittas
Consciousness mostly experienced in the immaterial
sphere (aråpa-loka)
4 Lokuttara cittas
consciousness experienced in the supramundane (transcendental)
level
The above four classes of cittas may be called in short, Kàma
cittas, Råpa cittas, Aråpa cittas and Lokuttara cittas.
Kàmàvacara cittas are experienced not only in the sensesphere
but also in other spheres. The same thing is true with
råpàvacara cittas and aråpàvacara cittas.