Buddhist Ethics: How Buddhists Decide Right From Wrong

By Tim Yu, Founder & Editor · Published 1 June 2026 · Updated 28 October 2026

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Buddhist ethics rests not on commandments from a god but on a single, practical question: does this action cause suffering, or relieve it? Right and wrong are judged by the intention behind an act and the harm or good it does — and the precepts are training rules for a freer, kinder life, not laws to be obeyed under threat.

This is how Buddhists decide right from wrong.

What is Buddhist ethics based on?

Buddhism is non-theistic, so its ethics is not obedience to a divine lawgiver. Instead, morality rests on two pillars: intention and harm. An action rooted in the three poisons — greed, hatred, and delusion — and one that causes suffering, is “unwholesome” (akusala); an action rooted in their opposites — non-greed, non-hatred, and non-delusion, the ground of generosity, kindness, and wisdom — and one that relieves suffering, is “wholesome” (kusala). The Buddha framed conduct as skilful or unskilful, not as sin and obedience. The five precepts are voluntary training rules, not commandments; and one test of any action, as the Kālāma Sutta puts it, is whether the qualities behind it are blameless, praised by the wise, and “lead to welfare & to happiness.”

Ethics without a lawgiver

Ethics built on divine command takes a lawgiver’s will to define right and wrong. Buddhism has no such figure — no creator God issuing laws — and this changes the whole shape of its ethics. Goodness here is not obedience. What grounds it instead is the natural law of karma together with compassion: actions have consequences woven into the fabric of things, and a wise person therefore acts in ways that reduce suffering rather than multiply it. Ethics (Pali sīla; Sanskrit śīla, a word that, as the Stanford Encyclopedia of Philosophy’s entry notes, means “something more like ‘moral discipline’”) is also the first of the three trainings — ethics, meditation, and wisdom — into which the factors of the Eightfold Path are grouped: right speech, right action and right livelihood fall under ethics (Cūḷavedalla Sutta, MN 44). It comes first for a reason the Buddha gave Ānanda: skilful ethics leads to having no regrets, and no regrets, step by step through joy and tranquillity, to immersion and truly knowing and seeing (AN 10.1). A mind churning with the guilt and agitation of harmful action cannot settle into meditation or open into clear seeing. You cannot fully separate being good from becoming free.

Intention is everything

If one idea sits at the heart of Buddhist ethics, it is intention. “Intention, I tell you, is kamma,” the Buddha declared (Nibbedhika Sutta, AN 6.63); “intending, one does kamma by way of body, speech, & intellect.” The moral weight of an act flows from the will behind it, which is why the very same outward action — a hand laid on another, a difficult truth spoken — can be wholesome or unwholesome depending on the heart that drives it. The decisive question is always the state of mind an act springs from: the Mūla Sutta (AN 3.69) names three roots of what is unskilful — greed, aversion (often rendered hatred), and delusion — and says that whatever a person in their grip does by body, speech, or intellect is unskilful too; its three roots of what is skilful are lack of greed, lack of aversion, and lack of delusion, the soil in which generosity, lovingkindness, and wisdom grow.

The measure is suffering

Beneath the talk of wholesome and unwholesome lies a single, unifying criterion: suffering. Does this action cause harm — to oneself, to others, to both — or does it relieve it? That thread runs through every one of the precepts, which are, at bottom, simply forms of not harming: do not kill, steal, commit sexual misconduct, lie, or cloud the mind with intoxicants. And the Buddha offered a test anyone can apply. Telling the Kālāmas (AN 3.65) not to settle a question by report, by tradition, by scripture or by the authority of a teacher, he gave them something to put in its place:

The negative half of the test is its mirror: qualities that are “unskillful … blameworthy … criticized by the wise” and that “lead to harm & to suffering” are to be abandoned (trans. Ṭhānissaro Bhikkhu). Buddhist ethics, on this account, is to be checked against its fruits, and against what the wise praise, rather than settled by report, tradition, scripture or a teacher’s say-so: its rightness is something you can watch unfold in your own life and the lives around you.

Ten courses of action: body, speech and mind

The discourses also give right and wrong conduct a fixed outline. In the Sāleyyaka Sutta (MN 41), the Buddha tells the brahmins and householders of Sālā that unprincipled conduct “is threefold by way of body, fourfold by way of speech, and threefold by way of mind” (trans. Bhikkhu Sujato):

• Body: killing living creatures, stealing, sexual misconduct.
• Speech: lying, backbiting (repeating what was said “so as to divide people against each other”), harsh speech, talking nonsense.
• Mind: covetousness, ill will, wrong view.

The ten skilful courses are the same list given up: one who gives up backbiting will “reconcile those who are divided”. Speech takes four of the ten places, and on the path it has a factor of its own, right speech, beside right action; three of the ten are conduct of the mind alone. The list covers what four of the five precepts forbid, the Stanford Encyclopedia of Philosophy entry by Charles Goodman and Aaron Schultz notes, “with the exception of drunkenness.”

The Buddha also taught a method. In MN 61 he asks his son Rāhula what a mirror is for (“for checking your reflection”) and draws the lesson:

Before, during and after acting, Rāhula is to ask whether a deed leads “to hurting myself, hurting others, or hurting both”; a harmful deed of body or speech already done is to be confessed to the Teacher or a spiritual companion.

Skilful, not “sinful”

Buddhism does not really speak of sin. An offence is not a crime against a deity to be punished, but an unskilful act — akusala, usually translated “unskilful” or “unwholesome.” The model is less the courtroom than the physician: a harmful action is like touching a hot stove or eating bad food — it brings suffering by its own nature, not by a judge’s sentence. Traditional Buddhist cosmology does teach rebirth in hell realms as a consequence of harmful action, but as one station in a cycle in which beings keep “wandering from one realm to another” (Goodman and Schultz, Stanford Encyclopedia of Philosophy), not as an everlasting sentence. And the response the Buddha recommends to having done wrong is not despair: in the Saṅkhadhama Sutta (SN 42.8) the disciple reflects, “That’s not right, it’s not good, and I feel remorseful because of it. But I can’t undo what I have done,” and so gives up the deed and refrains from it in future. Morality becomes a training toward freedom, not a fearful obedience under threat.

The precepts: training rules, not commandments

This is exactly why the five precepts are phrased the way they are. They are sikkhāpada — training rules — undertaken voluntarily: not “Thou shalt not,” handed down, but … veramaṇisikkhāpadaṁ samādiyāmi, “I undertake the precept to refrain from …,” taken up by oneself as a personal commitment. To break one is to fail at a training you set yourself, an occasion to learn rather than a sin to be condemned for. The five are the baseline for lay life; others take on more, as the next section sets out.

Five, eight or hundreds: lay and monastic codes

How many rules a Buddhist keeps depends on who they are, and on the day. The Stanford Encyclopedia calls the five precepts for lay people and the monastic vows of individual liberation (prātimokṣa) “the two most important systems of moral discipline in Buddhism”.

• Lay life: five. The five precepts above; the precepts check-in is a short evening review of them, with no score.
• Observance days: eight. In AN 8.41 a disciple keeps the eight precepts “for this day and night”: chastity in place of the third precept, then eating “in one part of the day”, no shows or adornment, and no “high and luxurious beds”. Access to Insight notes that lay people keep them on observance (uposatha) days and in periods of intensive meditation; dates are on the uposatha calendar.
• Novices: ten. Novice monks and nuns keep ten (listed in Khp 2), which add a rule against handling money (Access to Insight).
• Monastic life: hundreds. The count depends on the Vinaya, the monastic discipline, that a community ordains under. Access to Insight gives 227 Pātimokkha rules for Theravāda monks and 311 for nuns; 84000’s glossary says a monk in the Tibetan tradition, which follows the Mūlasarvāstivāda Vinaya, “follows 253 rules”; East Asian communities ordain under a third code, the Dharmaguptaka Vinaya. Where full ordination for women survives is covered on bhikkhunī ordination.

Not every monastic rule is about harm. The Encyclopedia notes rules against acts reprehensible “merely by convention, such as eating after noon”, which “is not wrong” for someone who has not taken that vow.

Empathy: putting yourself in another’s place

Buddhist ethics is not only restraint; it has a warm, outward-facing core, and the Buddha grounded it in plain empathy. The Dhammapada makes that move in two lines:

The next verse repeats it with a single change — “life is dear to all” in place of “all fear death” (trans. Acharya Buddharakkhita). That is the basic moral move: to recognise that every other being feels as you do — wants happiness, fears pain — and to act accordingly. From that recognition grow the positive virtues the texts cultivate alongside rule-keeping: generosity (dāna), lovingkindness (mettā) and compassion (karuṇā). Ethics, in the end, is not just avoiding harm but cultivating good — which is why the four divine abidings (lovingkindness, compassion, sympathetic joy, and equanimity) matter so much: they are, in Goodman and Schultz’s words, “emotions in which awake people rest and from which they act.”

The bodhisattva’s ethics

Mahāyāna traditions generally keep the precepts and add a second commitment. Most Theravāda practitioners aspire to become arahants, the Encyclopedia notes, while “all serious Mahāyānists take the bodhisattva vow, promising to become Buddhas in order to help all beings.” Moral discipline becomes the second of the six perfections, and the vow carries its own codes:

• East Asia. The Brahma Net Sutra (Fanwang jing), which the YMBA English edition’s introduction describes as shaping monastic and lay practice in China, Korea and Japan, sets out ten major and forty-eight secondary bodhisattva precepts. Its first major precept asks for more than restraint: the disciple “ought to nurture a mind of compassion and filial piety, always devising expedient means to rescue and protect all beings” (YMBA edition). Its third secondary precept says a disciple “must not deliberately eat meat”. More on the bodhisattva vows.
• Tibet. Alexander Berzin lists eighteen root downfalls of the vow and “forty-six types of faulty behavior” in the version Atiśa brought to Tibet, which he says “all Tibetan traditions currently follow”; he explains them following Tsongkhapa’s fifteenth-century commentary.

When compassion breaks a rule

For Mahāyāna philosophers such as Asaṅga and Śāntideva, the Encyclopedia reports, “an advanced practitioner who is motivated by compassion”, seeing that a forbidden act would prevent more suffering than any permitted one, may “permissibly break the rules out of compassion.” Asaṅga’s examples, as it summarises them, include lying to save a life, and killing a bandit about to murder many spiritually advanced beings, partly to spare the bandit himself aeons in the hells. Following Asaṅga, the Encyclopedia concludes: “in extreme cases, violence may be permissible; but hatred is never justified.”

These passages are contested. The Encyclopedia places them among many Buddhist statements that an advanced practitioner may go beyond moral discipline, statements that “have been interpreted in dramatically different ways by various Asian traditions, and Western scholars disagree about how we should understand them”, and, discussing consequentialist readings, observes that many Buddhists, “especially in the Theravāda,” would place “a much higher standard on the justification of killing, if it can be justified at all.”

Zen and Shin: the precepts in Japan

Two Japanese schools show how far the precepts’ place can shift. In Sōtō Zen they are bound to sitting itself: an essay by Rev. Kenshu Sugawara on the Sōtōshū’s own English site describes the school’s teaching of “the oneness of Zen and the Precepts”, written into its constitution, and its doctrine of “transmitting and maintaining the Sixteen Precepts”, and quotes Dōgen: “When we sit in zazen, what precept is not observed, what merit is not actualized?” San Francisco Zen Center lists the sixteen as three refuges, three pure precepts and ten grave precepts, beginning “I vow not to kill”.

Jōdo Shinshū, whose founder is Shinran (1173–1263), moved the other way. Stripped of his monkhood when Hōnen and his followers were banished, Shinran wrote: “I am now neither a monk nor one in worldly life.” In shinjin, he taught, there is no distinction between “black-robed monks and white-clothed laity”, “the amount of evil one has committed is not considered”, and it “is a matter of neither practice nor good acts”. This was not licence. To followers who had heard “that no evil interferes with the attainment of birth” and drew the wrong lesson, he wrote: “‘Here’s some medicine, so drink all the poison you like’ – words like these should never be said.” Shin priests have long married; the scholar Jessica Starling describes Shin as having “doctrinally eschewed but practically manifest the distinction between lay and cleric”. See Pure Land Buddhism, can Buddhists get married? and, for clerical marriage across traditions, why Buddhists become monks.

A compass, not a map

One honest consequence of all this is that Buddhist ethics asks for judgement. It is not short of rules, but, as the Stanford Encyclopedia observes, Buddhist texts “don’t often take up the question of the general theoretical principles” that separate right from wrong; they tend to lay down particular rules, guidelines, virtues and vices and leave the matter there. Applying intention, non-harm, and compassion to a situation the texts never addressed therefore takes wisdom, and sincere Buddhists can, and do, weigh hard cases differently. There is rarely a rule to simply look up. It is why, on everyday questions — whether a Buddhist may eat meat, be vegan, eat eggs or onion and garlic, drink coffee, smoke, have tattoos, keep pets, kill an insect, swear, do yoga, or donate their organs — and on weightier ones like diet, our treatment of animals (including why Buddhists release animals), alcohol, sexuality and dating, LGBTQ identities, the environment and consumer culture, life online, and caste, poverty and social justice, this site shows a range of honest answers rather than one. What the tradition hands on, for such questions, is closer to a compass than a map. (Whether one may gamble is the same kind of question.)

The hard questions

Diet, drink, sex and animals are linked above. Four harder cases, each argued case by case:

• War. The Stanford Encyclopedia finds that the tradition generally sees war and violence as “deeply morally problematic”, yet “many forms of Buddhism have arrived at the position that in rare cases, war may be necessary”. See Buddhism and violence and can Buddhists be soldiers?.
• Work and money. A lay follower “should not engage” in trade in “weapons, living creatures, meat, intoxicants, and poisons” (AN 5.177, trans. Bhikkhu Sujato). Modern jobs are on right livelihood and Buddhism and work, earning and spending on Buddhism and money.
• Abortion. The Encyclopedia reports “considerable controversy”, “with the majority of writers taking a pro-life position”. The traditional view rests on rebirth at conception, a premise some Buddhists question; and holding abortion wrong, the entry adds, need not mean advocating “making abortion illegal”.
• The end of life. On euthanasia and assisted dying, the Encyclopedia finds Buddhist values that “may be in tension with each other” and warns that “we are unlikely to find any easy answers”. How Buddhists meet dying, offered as reflection, is on Buddhism and death.

How scholars classify Buddhist ethics

Scholars disagree over what kind of ethical theory this is; the Stanford Encyclopedia calls it “a subject of continuing research and debate”. The entry, which leaves East Asian Mahāyāna outside its scope, notes that no word in Sanskrit, Pāli or Tibetan “exactly corresponds” to the English “ethics”, and sets out several readings:

• Virtue ethics. First proposed by Damien Keown in The Nature of Buddhist Ethics (1992): nirvana plays the part of Aristotle’s eudaimonia, and the virtues take their value from it. He proposed it “primarily in relation to the Theravāda”.
• Consequentialism. Passages like the Advice to Rāhula judge acts by the affliction they cause, and one passage of Śāntideva’s Training Anthology “can most naturally be interpreted” as classical utilitarianism, though scholars question that reading, and others argue it would not extend to the whole tradition. The entry notes that one of its own authors, Charles Goodman, defends a “character consequentialism” at length in Consequences of Compassion (2009), counting virtue as well as happiness in the welfare to be promoted.
• Particularism. Scholars such as Charles Hallisey (1996) and Jay Garfield, the entry reports, find it “futile and misleading” to fit Buddhist ethics to a Western theory, and suggest it is pluralist and particularist.

The entry’s own caution applies to this page too: “We should not necessarily assume that all forms of Buddhism have the same structure at the level of ethical theory.”

What the traditions share, and where they differ

The Buddhist traditions share a moral vocabulary: intention as the root of action, greed, aversion, and delusion as the roots of harm, the precepts as training. They do not keep one code: the Pātimokkha differs by Vinaya, bodhisattva vows differ between Tibetan and East Asian lineages, Sōtō Zen and Jōdo Shinshū give the precepts very different places, and on when a rule may be broken, Mahāyāna writers, in Goodman and Schultz’s words, handle the question “rather differently” from the Theravāda. What the traditions do hold in common is that ethics is not a separate project: the three trainings of the Pali texts and the six perfections of the Mahāyāna both set moral discipline beside meditation and wisdom. (For the practical heart of it, see the five precepts; for the teaching it all rests on, the core teachings of Buddhism.)