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Āyatana (Pāli; Sanskrit) is a Buddhist term that has been translated as "sense base", "sense-media" or "sense sphere." ayatana (kye che):

The eighteen constituents for perception:
the six sensory objects such as sight, sound, smell, taste, and body sensation;
the six sense faculties such as the visual sensory faculty, the auditory sensory faculty, etc., and
the six sensory consciousnesses such as the visual consciousness, the auditory consciousness, etc.

In Buddhism, there are six internal sense bases (Pali: ajjhattikāni āyatanāni; also known as, "organs", "gates", "doors", "powers" or "roots") and six external sense bases (bāhirāni āyatanāni or "sense objects"; also known as vishaya or "domains"). Thus, there are six internal-external (organ-object) pairs of sense bases:

* eye and visible objects
* ear and sound
* nose and odor
* tongue and taste
* body and touch
* mind and mental objects

Buddhism and other Indian epistemologies identify six "senses" as opposed to the Western identification of five. In Buddhism, "mind" denotes an internal sense organ which interacts with sense objects that include sense impressions, feelings, perceptions and volition.

Saḷāyatana (Pāli; Skt. ṣaḍāyatana) refers to all six sense objects and six sense organs and is generally used in the context of the Twelve Causes (nidāna) of the chain of Dependent Origination.

1) ayatana * " the sources, bases of cognition, faculty, sense fields/ factors/ spheres/ mediums/ bases, constituents of experience, arising expansion as in mu bzhi entrances;
2) perception, state of mind;
3) source of perception);
4) six objects and six sense powers/ sense bases [IW]

source [thd]

sense field [RB]

ayatanas, (arise - spread), (interactional, operational, cognitive, sense, psychological action) fields, sources, interactional bases, localized fields of sensations, sensory creation of one's world, Vasubhandu, SA ci yang med pa'i skye mched, zil gyis gnon pa'i skye mched, rnam shes mtha' yas skye mched, sphere (name for the 4 formless dhyana), sense-bases/factors, sense bases, sources and places of origin of the senses, inner and outward organs of sense, field of extension (consciousness emerges and spreads), sense faculties, experiential medium, bases, sense sources [JV]

constituent[s] of experience, ayatanas, arising expansion [IW]

1) ayatana "medium for a sense perception to arise," the sources, bases, base of cognition, faculty, sense fields / factors / spheres, sense mediums, sour of perception constituent[s) of experience; arising expansion [as in mu bzhi. entrances. abbr. of skye mched bcu gnyis.

2) perception, state of mind.
3) source.
4) six objects and the six sense powers or sense bases; nyer spyod rnam par shes pa skye ba'i sgo las yul gzhan la mched par byed pa'i don gyis na skye mched ces bya'o sense door, sense-factors, sense-field, source, experiential medium [RY]

experiential medium [RY]

Sense bases, ayatana. The five senses and their five objects as well as the mental faculty and mental objects [RY]

Sources of perception, the six objects and the six sense powers or sense bases; constituent[s] of experience, arising expansion [as in mu bzhi.] [RY]

1) ayatana; sense bases, sense-field, source, the sources of perception;
The twelve sense factors are the five senses or
the organs of eye,
body and the
mental faculty as well as their corresponding objects which are:

visual form,
texture, and
the mental object.

2) perception-sphere/s. A variety of states of meditative absorption, possibly lasting many aeons within the four formless realms.
See also skye mched mu bzi 'fourfold spheres of perception.'

See under; gzugs med khams 'Formless Realms.'

3) base of perception [RY]

ayatana; source; Sources of perception, the six objects and the six sense powers or sense bases; sensory field; sense-field

In the Pali Canon

In the Four Noble Truths, the Buddha identifies that the origin of suffering (Pali, Skt.: dukkha) is craving (Pali: taṇhā; Skt.: tṛṣṇā). In the chain of Dependent Origination, the Buddha identifies that craving arises from sensations that result from contact at the six sense bases. Therefore, to overcome craving and its resultant suffering, one should develop restraint of and insight into the sense bases.

Sense-base contexts



Name & Form
Six Sense Bases
  [[Dukkha|Suffering]] [[Tanha|Craving]]   Cessation   the Path  
 ← 4 Noble Truths
Old Age & Death
Figure 2: The intersection of the
Twelve Causes and the Four Noble Truths:
How the sense bases lead to suffering.

Throughout the Pali Canon, the sense bases are referenced in hundreds of discourses. In these diverse discourses, the sense bases are contextualized in different ways including:

The sense bases include two sets of six: six sense organs (or internal sense bases) and six sense objects (or external sense bases). Based on these six pairs of sense bases, a number of mental factors arise. Thus, for instance, when an ear and sound are present, the associated consciousness (Pali: viññāṇa) arises. The arising of these three elements (dhātu) – ear, sound and ear-related consciousness – lead to what is known as "contact" (phassa) which in turn causes a pleasant or unpleasant or neutral "feeling" or "sensation" (vedanā) to arise. It is from such a feeling that "craving" (taṇhā) arises. (See Figure 1.) Such an enumeration can be found, for instance, in the "Six Sextets" discourse (Chachakka Sutta, MN 148), where the "six sextets" (six sense organs, six sense objects, six sense-specific types of consciousness, six sense-specific types of contact, six sense-specific types of sensation and six sense-specific types of craving) are examined and found to be empty of self.
In a discourse entitled, "The All" (SN 35.23), the Buddha states that there is no "all" outside of the six pairs of sense bases. In the next codified discourse (SN 35.24), the Buddha elaborates that the All includes the first five aforementioned sextets (sense organs, objects, consciousness, contact and sensations). References to the All can be found in a number of subsequent discourses. In addition, the Abhidhamma and post-canonical Pali literature further conceptualize the sense bases as a means for classifying all factors of existence.
As described in the "Related Buddhist concepts" section below and illustrated in Figure 2, the sense bases are a critical link in the endless round of rebirth known as the Twelve Causes and as depicted in the Wheel of Becoming (Skt.: bhavacakra).

"Aflame with lust, hate and delusion"


In "The Vipers" discourse (Asivisa Sutta, SN 35.197), the Buddha likens the internal sense bases to an "empty village" and the external sense bases to "village-plundering bandits." Using this metaphor, the Buddha characterizes the "empty" sense organs as being "attacked by agreeable & disagreeable" sense objects.

Elsewhere in the same collection of discourses (SN 35.191), the Buddha's Great Disciple Sariputta clarifies that the actual suffering associated with sense organs and sense objects is not inherent to these sense bases but is due to the "fetters" (here identified as "desire and lust") that arise when there is contact between a sense organ and sense object.

In the "Fire Sermon" (Adittapariyaya Sutta, SN 35.28), delivered several months after the Buddha's awakening, the Buddha describes all sense bases and related mental processes in the following manner:

"Monks, the All is aflame. What All is aflame? The eye is aflame. Forms are aflame. Consciousness at the eye is aflame. Contact at the eye is aflame. And whatever there is that arises in dependence on contact at the eyeexperienced as pleasure, pain or neither-pleasure-nor-pain – that too is aflame. Aflame with what? Aflame with the fire of passion, the fire of aversion, the fire of delusion. Aflame, I tell you, with birth, aging & death, with sorrows, lamentations, pains, distresses, & despairs."

Extinguishing suffering's flame

The Buddha taught that, in order to escape the dangers of the sense bases, one must be able to apprehend the sense bases without defilement. In "Abandoning the Fetters" (SN 35.54), the Buddha states that one abandons the fetters "when one knows and sees ... as impermanent" (Pali: anicca) the six sense organs, objects, sense-consciousness, contact and sensations. Similarly, in "Uprooting the Fetters" (SN 35.55), the Buddha states that one uproots the fetters "when one knows and sees ... as nonself" (anatta) the aforementioned five sextets.

To foster this type of penetrative knowing and seeing and the resultant release from suffering, in the Satipatthana Sutta (MN 10) the Buddha instructs monks to meditate on the sense bases and the dependently arising fetters as follows:

"How, O bhikkhus, does a bhikkhu live contemplating mental object in the mental objects of the six internal and the six external sense-bases?
"Here, O bhikkhus, a bhikkhu understands the eye and material forms and the fetter that arises dependent on both (eye and forms); he understands how the arising of the non-arisen fetter comes to be; he understands how the abandoning of the arisen fetter comes to be; and he understands how the non-arising in the future of the abandoned fetter comes to be. [In a similar manner:] He understands the ear and sounds ... the organ of smell and odors ... the organ of taste and flavors ... the organ of touch and tactual objects ... the consciousness and mental objects....
"Thus he lives contemplating mental object in mental objects ... and clings to naught in the world."

In post-canonical Pali texts

The Vimuttimagga, the Visuddhimagga, and associated Pali commentaries and subcommentaries all contribute to traditional knowledge about the sense bases.

Understanding sense organs


When the Buddha speaks of "understanding" the eye, ear, nose, tongue and body, what is meant?

According to the first-century CE Sinhalese meditation manual, Vimuttimagga, the sense organs can be understood in terms of the object sensed, the consciousness aroused, the underlying "sensory matter," and an associated primary or derived element that is present "in excess." These characteristics are summarized in the table below.

in excess
eye visual objects visual consciousness "...the three small fleshy discs round the pupil, and the white and black of the eye-ball that is in five layers of flesh, blood, wind, phlegm and serum, is half a poppy-seed in size, is like the head of a louseling...." heat (fire)
ear sounds auditory consciousness " the interior of the two ear-holes, is fringed by tawny hair, is dependent on the membrane, is like the stem of a blue-green bean...." space
nose odors olfactory consciousness " the interior of the nose, where the three meet, is dependent on one small opening, is like a Koviḷāra (flower in shape)...." air
tongue tastes gustatory consciousness "...two-finger breadths in size, is in shape like a blue lotus, is located in the flesh of the tongue...." water
body tangibles tactual consciousness " the entire body, excepting the hair of the body and the head, nails teeth and other insensitive parts...." earth
Table 1. The Vimuttimagga's characterization of sense organs.

The compendious fifth-century CE Visuddhimagga provides similar descriptors, such as "the size of a mere louse's head" for the location of the eye's "sensitivity" (Pali: pasāda; also known as, "sentient organ, sense agency, sensitive surface"), and "in the place shaped like a goat's hoof" regarding the nose sensitivity (Vsm. XIV, 47–52). In addition, the Visuddhimagga describes the sense organs in terms of the following four factors:

Thus, for instance, it describes the eye as follows:

Herein, the eye's characteristic is sensitivity of primary elements that is ready for the impact of visible data; or its characteristic is sensitivity of primary elements originated by kamma sourcing from desire to see. Its function is to pick up [an object) among visible data. It is manifested as the footing of eye-consciousness. Its proximate cause is primary elements born of kamma sourcing from desire to see.

In regards to the sixth internal sense base of mind (mano), Pali subcommentaries (attributed to Dhammapāla Thera) distinguish between consciousness arising from the five physical sense bases and that arising from the primarily post-canonical notion of a "life-continuum" or "unconscious mind" (bhavaṅga-mana):

"Of the consciousness or mind aggregate included in a course of cognition of eye-consciousness, just the eye-base [not the mind-base) is the 'door' of origin, and the external sense base of the material form is the visible object. So it is in the case of the others [that is, the ear, nose, tongue and body sense bases. But of the sixth sense-base the part of the mind base called the life-continuum, the unconscious mind, is the 'door' of origin...."

The roots of wisdom

In the fifth-century CE exegetical Visuddhimagga, Buddhaghosa identifies knowing about the sense bases as part of the "soil" of liberating wisdom. Other components of this "soil" include the aggregates, the faculties, the Four Noble Truths and Dependent Origination.

Related Buddhist concepts