What this concept is about
The Four Bases of Spiritual Power — 四如意足 (Skt. *ṛddhipāda*), also widely translated as 四神足 ("four bases of spiritual power," "four bases of psychic potency") — are the ninth through twelfth of the thirty-seven factors of enlightenment (三十七菩提分法). The four are: the base whose fuel is aspiration (欲定如意足, *chanda-samādhi*), the base whose fuel is effort (精进定/勤定如意足, *vīrya-samādhi*), the base whose fuel is mind itself (心定/意定如意足, *citta-samādhi*), and the base whose fuel is investigation / consideration (思惟定/观定如意足, *mīmāṃsā-samādhi*).
The crucial thing about these four is not the list. It is the qualifying phrase that attaches to each one: each must be "成就断行" — completed with the work of *cutting off* — and each proceeds "依离、依无欲、依灭，趣向出要/趣向非品" — *depending on seclusion, on dispassion, on cessation*, moving toward what is beyond. The names list the fuel; the phrases tell you what kind of fire this fuel is supposed to make. Skip the phrases, and you have a different, much thinner practice.
Why these four, and why in this position
In the Middle-Length Discourses (中阿含经), the Buddha offers a striking three-step metaphor: the four foundations of mindfulness (四念处) are the appearance of samādhi (定相); the four right efforts (四正断) are the power of samādhi (定力); and the four bases of spiritual power are the function and achievement of samādhi (定功). This tells you exactly where they sit in the path.
You have already, through mindfulness, seen body as body, feeling as feeling, mind as mind, dharmas as dharmas. You have already, through right effort, been guarding against arisen unwholesome states, eliminating them, cultivating unarisen wholesome ones, and sustaining them. Now the question is: can that concentrated momentum *actually do its work of cutting off*? That "actually doing its work" is what the four bases are for. The Mahāratnakūṭa Sūtra (大宝积经) makes the sequential dependency explicit: "If one can practice these four right efforts, one can fulfill the four bases of spiritual power." Without the effort already in place, the bases have nothing to mature.
The Long Discourses (长阿含经) add the historical-vertical framing: these four are the root of every spiritual marvel any ascetic or Brahmin ever displayed — past, future, and present. The same text records the well-known refusal-to-extend-life episode: the Buddha states that he has fully cultivated the four bases of spiritual power and could, if he chose, live one more aeon (this episode corresponds to the Mahāparinibbāna Sutta / DN 16 in the Pāli). Ānanda's failure to make the request three times becomes, in the narrative, the hinge on which the Buddha's final passing turns.
What each base actually means (and what it doesn't)
Each base has a *fuel* — chanda, vīrya, citta, mīmāṃsā — and a *result* — samādhi, completed with the cutting-off work. The fuels are not interchangeable.
- **Aspiration (欲, *chanda*)** — In this context, not greed. It is the *wholesome inclination* — "I want to be free," "I want this loop to stop," "I want to understand what this is." You will not sit through a difficult hour of insight practice if this aspiration is missing or has degraded into mere duty. The Pāli term *chanda* carries both senses (ordinary desire and wholesome inclination); the pairing with samādhi and the qualifier "依无欲" disambiguates which sense is in play.
- **Effort (精进/勤, *vīrya*)** — The energy that keeps the practice going when aspiration cools, when the body aches, when the mind is bored. The four right efforts were already cultivating this energy in their second and fourth functions (cultivating the unarisen wholesome, sustaining what has arisen). Here that energy is brought to bear specifically on concentration that *cuts off*.
- **Mind (心/意, *citta*)** — The mind itself becomes the fuel. When the mind is already gathered — collected, unified, not scattered — that very collectedness carries the concentration forward. This is why some meditators find their best sessions are the second or third sit of the day, not the first: the mind has remembered its own collectedness and uses that recollection as fuel.
- **Investigation / Consideration (思惟/观, *mīmāṃsā*)** — Discerning inquiry. Looking into the object, examining it, taking it apart. Not *thinking about* it in the ordinary discursive sense, but *looking at it directly* (what the early Buddhist texts call *yoniśo manasikāra*, "appropriate attention"). This is the wisdom side, and it is the reason the four bases are not just about absorption — they are about samādhi that can *cut off*.
The Mahāratnakūṭa offers an interesting alternative naming: rather than labeling them by the four fuels, Mañjuśrī labels them by four postures of the practitioner's heart — tireless joy in cultivating wholesome dharmas; energy for cutting greed for the sake of all beings; realization that all dharmas cannot be grasped, and through that realization, the realization of the Buddha-dharmas; and a mind like an illusion, unattached, transcending all grasping. Same four, different angle: instead of asking what the *fuel* is, Mañjuśrī asks what the *practitioner's heart* is doing.
The two layers in the name "如意足" / "神足"
The name carries two layers that should not be collapsed. The first is *īhā / āsevana* — repeated, familiar, sustained practice — until what was an occasional activity becomes a *basis* (足) under you. The second is *ṛddhi* — the spiritual potency that arises from such a basis. The Long Discourses list classic feats (分一为众、合众为一,穿越石壁,入地如水,履水如地,升空而坐,手扪日月,身至梵天 — dividing oneself into many, becoming many into one, passing through walls, sinking into earth, walking on water, flying, touching the sun and moon, reaching the Brahmā world), but in the same text the Buddha redirects the conversation to what liberation actually requires. The feats are *expression* (示现), not *purpose*.
The Mahāratnakūṭa's translation of the four into the four kinds of mastery (四自在) is closer to what genuine spiritual freedom actually looks like in practice:
- Mastery of lifespan (寿自在) — long or short, as the work requires - Mastery of body-and-speech (身口自在) — form and expression shifting to meet the need - Mastery of dharma (法自在) — speaking to the world in its own idiom without distortion - Mastery of mind (心自在) — establishing or dissolving circumstances as the work requires
If you want a single image for what "如意足" actually matures into, these four masteries are more honest than the stage-magic list.
One naming trap to avoid
In the Long Discourses' "Wheel-Turning King" chapter there is a *different* list with a confusingly similar name: the four divine virtues (四神德) of the king — long life, freedom from illness, beauty of countenance, abundance of treasure. Same-sounding *shén* ("divine/spiritual"), completely different concept. Those are about a king's worldly fortune; the four bases of spiritual power are about a renunciant's capacity to cut off. The texts themselves keep them separate; readers should too.
The śūnyatā warning that travels with the four
The Mahāratnakūṭa's verse is the kind of line that gets quoted once and forgotten: *"The four bases of spiritual power are the supreme, secure, liberating path; the stilled faculties of beings who cultivate this path attain nirvāṇa. Yet the wishful and the basis and the practitioner, upon true observation, cannot be found; they are not denied as if they didn't exist, but they are not posited as having ultimate essence either."*
This is the Mahāyāna reading: don't cling to the four as if they had an independent essence, but don't throw them away either. They work precisely *as* conventional designations. The Great Vehicle version of the practice never loses this double exposure — the four are doing their cutting-off work while remaining, upon inspection, ungraspable. A practitioner who ends the practice by saying "I have achieved the four bases" has missed the last turn of the screw.
Walk-through in contemporary life
Pick a scene most contemporary readers recognize: the late-night phone scroll you keep meaning to stop.
You've told yourself for three months you want to break the habit. Tonight, around 11 p.m., you find yourself again on the couch, thumb already moving. Notice what the four bases of power are doing — or failing to do — in this exact moment.
Where is the aspiration (欲)? If your aspiration is "I want to feel less exhausted tomorrow morning," it is *there* but it is weak — it lives in tomorrow-morning language, not now-language. If the aspiration is "I am genuinely tired of this loop, I want to be free of the undercurrent of compulsion underneath it," that is a different quality entirely. The first is a wish; the second is what *chanda* means here. A weak aspiration cannot carry a difficult concentration. A clear one can.
Where is the effort (精进)? You turn the phone face-down. You sit up. You stand up. You walk to the bedroom. Each of these is a small exertion. The four right efforts were already trying to do this earlier in the day. The four bases ask: can this effort actually *complete its cutting-off work* — right now, in this moment — without sliding into a more subtle form of the same compulsion ("just one notification," "just to set the alarm," "I'm doing this for self-care reasons")?
Where is the mind (心)? If you meditated for twenty minutes earlier in the evening, your mind has a memory of its own collectedness. That memory is the fuel; the mind can sit with the discomfort of not reaching for the phone. If you didn't meditate, the mind is scattered, looking for its object everywhere, and the same effort applied to the same situation lands very differently. The mind-side of the four bases is, in a real sense, the memory of having been concentrated before.
Where is the investigation (观/思惟)? This is the one contemporary practitioners most often skip. Investigation does *not* mean narrating the loop ("I'm addicted to dopamine," "I have poor self-regulation," "this is a generational pathology"). It means *looking directly at* the sensation of compulsion in the chest, the involuntary reach toward the phone, the slight shame afterwards. If you can look at it directly — the way the four foundations of mindfulness trained you to look at the body — the loop begins to break from the inside, not from outside willpower. Without investigation, the four bases become a sophisticated form of suppression. With investigation, they become samādhi that *cuts off*.
The point is not that you should "apply the four bases" like a four-step program. It is that the four are *already* operating — or failing to operate — in every moment you try to redirect yourself. The practice is to recognize which one is currently load-bearing, which one needs strengthening, and whether all four together can complete the cutting-off work *依离、依无欲、依灭* — depending on seclusion (you closed the tab), on dispassion (the wish for the next hit is loosening), on cessation (the loop actually stops).
The most common mapping mistake to flag here: people hear "investigation" (思惟/观) and think it means *thinking about* the loop. It does not. In the classical context, this is *direct inspection* — the kind of looking that has already been trained in the four foundations of mindfulness. The four bases are not a step *before* insight; they are the place where insight and concentration do their joint work of cutting off. If you treat 观 as discursive thinking, you have turned a cutting tool into a commentary on the wood.
Why contemporary people need this
The modern self has a peculiar configuration: a great deal of aspiration, a great deal of effort, a scattered mind, and very little investigation. The aspirational and motivational industry is enormous — productivity literature is essentially 精进 literature with branding. Mindfulness apps try to supply the mind-side. But the investigation-side — the willingness to actually look at the compulsion, the patterned reaction, the looping story, without narrating or suppressing it — is comparatively rare. People will sit, will exert, will even gather their minds for a moment, but few will *look*.
In this configuration, the four bases of spiritual power are the missing piece that joins the rest. Without them, the modern meditator or self-improver has motivation and willpower but lacks the integration that turns those into actual samādhi — and the cutting-off work that samādhi is supposed to accomplish. This is why the classical texts place the four bases *after* the four right efforts: efforts alone don't finish the job. They need a basis on which to mature. The contemporary version of this problem is the person who has been trying to meditate, exercise, journal, or change habits for years, has generated enormous effort, and is still running the same loops. What is missing is not more effort. It is the integration the four bases are describing.
The contemporary neuroscience of attention and self-regulation is roughly comparable but not equivalent. Studies of attentional training, deliberate practice, and contemplative practice show that focused attention is trainable, that the relevant neural regions show structural and functional changes with practice, and that sustained training alters stress reactivity and self-regulation. This is useful *as analogy*: the brain is the substrate on which repeated, familiar cultivation (āsevana) operates, and the substrate responds to practice. But neuroscience does not — and cannot, given its methodology — confirm the doctrinal claim that such training, pursued through the four bases *as the texts specify*, *cuts off* the defilements at their root. The "cutting off" claim is one that the practitioner verifies or doesn't, in their own experience, by the criteria the texts themselves offer: *依离, 依无欲, 依灭* — the seclusion, dispassion, and cessation that the practice actually produces. To claim more for neuroscience than it can deliver is the same category error the texts warn against — making the map into the territory.
The Long Discourses' line about past, future, and present ascetics and Brahmins all displaying spiritual power from these four is, in contemporary terms, a quiet claim that there is no shortcut to genuine spiritual capacity. Every tradition that has produced serious practitioners — Theravāda, Chan/Zen, Tibetan, the secular-mindfulness stream — eventually arrives at something functionally similar to the four bases, even when using very different vocabulary. Aspiration, effort, mind, and investigation, deeply cultivated, are the basis; the rest is decoration.
Common misreadings and clarifications
Misreading 1: "Four Bases of Spiritual Power" = psychic powers. The most common misreading in popular writing. The feats of passing through walls and walking on water are *expressions* (示现) of the four bases when they are deeply cultivated; they are not what the four bases are for. In the same passage where these feats are listed, the Buddha redirects the conversation to what liberation actually requires. The Mahāratnakūṭa's translation of the four into the four kinds of mastery (lifespan, body-and-speech, dharma, mind) is closer to what "spiritual power" actually matures into for a serious practitioner.
**Misreading 2: 欲 (*chanda*) here means ordinary desire.** In common Chinese, 欲 is desire in the sense of "wanting what the senses want." In this context, 欲 is wholesome inclination — closer to "the kind of wanting that pulls you toward freedom rather than toward acquisition." The texts repeatedly specify "依离、依无欲" — depending on dispassion — which would be self-contradictory if 欲 here meant ordinary desire. The Pāli term *chanda* does carry both senses; the context (paired with samādhi, paired with the cutting-off work) is the disambiguator.
Misreading 3: The four bases are a four-step program to follow in order. The Middle-Length Discourses' image of them as the king's carriage (纲舆) and the commentary's identification of them as the *achievement* of samādhi suggest *integration*, not sequence. In real practice, all four are operating in any moment of genuine concentration; the question is which one is currently load-bearing, which needs strengthening, and whether all four together can complete the cutting-off work. Reading them as a checklist misses the integration point.
Misreading 4: Confusing 四神足 with 四神德 (the four divine virtues of the wheel-turning king). Same sounding *shén*, different concept entirely. The four divine virtues — long life, freedom from illness, beauty, abundance — are about a king's worldly fortune; the four bases of spiritual power are about a renunciant's capacity to cut off. The Long Discourses' Wheel-Turning King chapter contains both, and the text itself keeps them separate; readers should too.
Misreading 5: Missing the "depending on seclusion, dispassion, cessation" qualifier. The most subtle misreading. Practitioners often memorize the four fuels and the "completion of the work of cutting off" phrase but skip that each base is to be pursued *依离、依无欲、依灭*. This qualifier changes what kind of concentration the four bases produce. Without it, the four become a sophisticated method of cultivating strong, stable states of mind — useful, but not the cutting-off work the texts describe. With it, each base is oriented toward the *release* the path is supposed to deliver, not just to the production of a stronger mind.
Misreading 6: Missing the śūnyatā layer. The Mahāratnakūṭa's verse is unambiguous: the four bases themselves are "not found upon true observation." A practitioner who clings to the four as having ultimate essence — "I have achieved the four bases of power" — has missed the last turn of the screw. The four are a conventional designation that does its work precisely *as* designation. They have no independent essence to grasp onto, and that is not a failure of the practice; it is the practice correctly understood.
Misreading 7: Treating it as the destination rather than the basis for what follows. The four bases are followed, in the thirty-seven, by the five faculties (信, 精进, 念, 定, 慧), the five powers, the seven factors of enlightenment, and the noble eightfold path. They are an *achievement* of samādhi, not its culmination. Treating them as the destination misses that the path continues — and that the five faculties are already implicit in the four (faith, effort, mindfulness, samādhi, wisdom are the maturation of what the four bases have begun). Stopping at the four is like arriving at a train station and thinking you have reached the destination because the platform feels stable.