The
Early Buddhist schools developed detailed analyses and overviews of the teachings found in the sutras, called
Abhidharma. Each school developed its own Abhidharma. The best-known is the
Theravāda Abhidhamma, but the
Sarvāstivāda Abhidharma was historically very influential, and has been preserved partly in the Chinese Āgama.
Six sense bases The internal and external sense bases together form the "six sense bases". In this description, found in texts such as
Salayatana samyutta, the coming together of an object and a sense-organ results in the arising of the corresponding consciousness. According to
Bhikkhu Bodhi, the Theravada tradition teaches that the six sense bases accommodate "all the factors of existence"; it is "the all", and "apart from which nothing at all exists", and "are empty of a self and of what belongs to the self". The suttas do not describe this as an alternative of the skandhas. The Abhidhamma, striving to "a single all-inclusive system", explicitly connects the five aggregates and the six sense bases: • The first five
external sense bases (visible form, sound, smell, taste and touch), and the first five
internal sense bases (eye, ear, nose, tongue and body) are part of the form aggregate; • The mental sense-object (i.e. mental objects) overlap the first four aggregates (form, feeling, perception and formation); • The mental sense organ (mind) is comparable to the aggregate of consciousness. Bodhi states that six-sense-bases is a "vertical" view of human experiences while the aggregates is a "horizontal" (temporal) view. The Theravada Buddhist meditation practice on sense bases is aimed at both removing distorted cognitions such as those influenced by cravings, conceits and opinions, as well as "uprooting all conceivings in all its guises".
The four paramatthas The Abhidhamma and post-canonical Pali texts create a meta-scheme for the
Sutta Pitaka's conceptions of aggregates, sense bases and dhattus (elements). This meta-scheme is known as the four
paramatthas or ultimate realities, three conditioned, one unconditioned: • Material phenomena (rūpa, form) • Mind or consciousness (citta) • Mental factors (cetasikas: the nama-factors sensation, perception and formation) •
Nibbāna Twelve Nidanas The
Twelve Nidanas is a linear list of twelve elements from the
Buddhist teachings which arise in dependence on the preceding link. While this list may be interpreted as describing the processes which give rise to rebirth, in essence it describes the arising of
dukkha as a psychological process, without the involvement of an atman. Some scholars regard it to be a later synthesis of several older lists. The first four links may be a mockery of the Vedic-Brahmanic cosmogony, as described in the
Hymn of Creation of Veda X, 129 and the
Brihadaranyaka Upanishad. These were integrated with a branched list that describes the conditioning of mental processes, akin to the five skandhas. Eventually, this branched list developed into the standard twelvefold chain as a linear list. According to Boisvert, "the function of each of the aggregates, in their respective order, can be directly correlated with the theory of dependent origination—especially with the eight middle links." Four of the five aggregates are explicitly mentioned in the sequence, yet in a different order than the list of aggregates, which concludes with '''': • mental formations (
saṅkhāra • saṃskāra) condition consciousness ('''') • which conditions name-and-form (
nāma-rūpa) • which conditions the precursors (''
, phassa • sparśa
) to sensations (vedanā'') • which in turn condition craving (''
) and clinging (upādāna'') • which ultimately lead to the "entire mass of suffering" (
kevalassa dukkhakkhandha). The interplay between the five-aggregate model of immediate causation and the twelve-nidana model of requisite conditioning is evident, for instance both note the seminal role that mental formations have in both the origination and cessation of suffering.
Satipatthana Mindfulness applies to four
upassanā (domains or bases), "constantly watching sensory experience in order to prevent the arising of cravings which would power future experience into rebirths," which also overlap with the skandhas. The four domains are: • mindfulness of the body (kaya); • mindfulness of feelings or sensations (
vedanā); • mindfulness of mind or consciousness (
citta); and • mindfulness of
dhammās. According to Grzegorz Polak, the four
upassanā have been misunderstood by the developing Buddhist tradition, including Theravada, to refer to four different foundations. According to Polak, the four
upassanā do not refer to four different foundations of which one should be aware, but are an alternate description of the
jhanas, describing how the
samskharas are tranquilized: • the
six sense-bases which one needs to be aware of (
kāyānupassanā); • contemplation on
vedanās, which arise with the contact between the senses and their objects (
vedanānupassanā); • the altered states of mind to which this practice leads (
cittānupassanā); • the development from the
five hindrances to the
seven factors of enlightenment (
dhammānupassanā). ==In the Mahayana tradition==