Reply To: Suddhāṭṭhaka


1. A kalāpa means a group. All rupa are made of fundamental groups of matter ( rupa kalāpa.

  • The smallest is a suddhāṭṭhaka (meaning a pure octad with eight constituents). All other rupa kalāpa assemble by adding to suddhāṭṭhaka.
  • The higher ones are navaka (with one more added to a suddhāṭṭhaka), a dasaka (with two more added), and eka dasaka (with three more added.) 
  • The hadaya vatthu and the five pasada rupa are all dasaka. 
  • See “Rupa Kalāpa (Grouping of Matter).”

2. All those fundamental groups (rupa kalāpa) make up every rupa in the world. A rupa kalāpa is unimaginably tiny. We cannot see even an electron or a photon, but they are made of trillions of rupa kalāpa.

  • There are 4 modes of origin of rupa: kamma, citta, utu, ahara.
  • All those arise based on the mind. Specifically, they have their origins in javana citta. 
  • Cittaja rupa (Cittaja comes from citta + ja, meaning “due to citta) are those produced by cittas as they arise. Part of the energy in javana cittas is “stored” in the “vinnana plane” to bring kamma vipaka later. Those rupa that arise later by that mechanism are kammaja rupa
  • Utuja rupa and aharaja rupa are a bit more complex. They are also discussed in the above post.


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