Absorption (jhana)

Absorption (jhana) is a state of complete meditative concentration in which awareness unifies around a single object and peripheral thought and sensation recede entirely.

As a drug effect it is acute and not reliably dose-dependent, arising most readily at the intersection of psychedelic use and trained contemplative attention, distinguishing it from ordinary focused attention. It ranges from an effortless gathering of awareness to a profound cessation of self-referential thought and bodily sensation.

It is rare and reported almost exclusively in individuals with prior meditation practice. It is most commonly induced under psychedelics such as LSD, particularly when combined with formal sitting practice or when a quiet, inward-facing set and setting encourages deep single-pointed concentration.

Absorption (jhana) is felt as a settling into stillness: attention locks onto its object — the breath, a sound, a subtle sensation — and other mental content stops arising.

It commonly comes with a marked reduction in bodily awareness, a sense of ease or buoyancy, and a slowing of the perceived passage of time. Attending to the state tends to deepen rather than break it; awareness folds back onto the absorption itself. At greater depth, even the original object of concentration may dissolve into undifferentiated, luminous awareness.

Absorption (jhana) arises through different pathways depending on the drug class:

• Psychedelics — act on 5-HT2A receptors, suppressing default-mode network activity and interrupting habitual self-referential processing; in a practitioner who enters the substance with trained concentrated attention, the resulting quieting of discursive thought can allow the profound unification of awareness characteristic of jhana states to emerge more readily than in unassisted practice.

How much each pathway contributes in a given case is not fully understood.

Who experiences it, and how strongly, varies widely. Dose is less determinative than set — the effect is essentially unreported in those without prior meditation training. Sustained practice with single-pointed concentration techniques is the strongest predictor. A quiet, uninterrupted setting and an inward-directed intention strongly favor its appearance.

Striving for the state tends to impede it; the relaxation it requires cannot be forced. Prior familiarity with concentration states in unassisted practice is the most reliable facilitating factor.