Hinduism and Buddhism: the difference

Two rivers from one watershed

Around the fifth century BCE, in the plains along the Ganges, a restless spiritual energy was moving through northern India. Wandering seekers called shramanas had left home and ritual behind to ask the oldest questions directly: why do we suffer, why are we born again and again, and how does it end. Out of that ferment came several movements. One of them gathered around a former prince from the Shakya clan who, after long searching, said he had woken up, and became known as the Buddha, “the awakened one.” Another current, reforming and deepening the older Vedic religion through the teaching of the Upanishads, would in time be called Hinduism.

They came from the same watershed. They breathed the same air, used much of the same vocabulary, and asked the same questions. This is exactly why they are so often confused, and why telling them apart requires care rather than slogans. The honest picture is a large shared foundation with three deep and decisive cracks running through it. Start with what they hold in common, because it is more than most people expect.

What they share

Both traditions take for granted a moral universe governed by karma: actions carry consequences, good and bad, that shape the future across lives, this life and the ones to come. Both accept rebirth, the passage through many lifetimes, and both call the wheel of that wandering samsara, a round of birth, death, and re-becoming driven by craving and ignorance. Both regard this endless round as the fundamental predicament, and both offer release from it as the highest goal.

Both hold up ahimsa, non-violence, as a central ethical ideal. Both trust that the way out runs through ethical discipline, meditative training, and a transforming insight into the way things really are, rather than through ritual alone. They share technical words and methods: dhyana, meditative absorption, samadhi, deep concentration, the use of mantra, the figure of the renunciant who leaves ordinary life to pursue liberation. A great deal of the machinery is common property. The disagreements are all the sharper for it, because they are disagreements between two traditions that understood each other very well.

Crack one: the self

The deepest split is over the self, and nearly everything else follows from it.

Hinduism, especially in the Upanishads, affirms the atman: an eternal, unchanging true Self, deeper than body, personality, and the passing stream of thoughts. In the great schools of Vedanta this Self is either identical with ultimate reality or utterly dependent on it, and to know it truly is to be free. The Upanishadic teaching tat tvam asi, “that thou art,” points to this Self as one with the ground of all being. The whole of that claim is unfolded in Atman and Brahman.

Buddhism denies exactly this. Its signature doctrine is anatta, or anatman, “no-self”: there is no permanent, unchanging essence anywhere, in persons or in things. What we call a self is a bundle of ever-changing processes, physical and mental, with no fixed core running through them. The Buddha taught that the very grasping after a permanent self is a chief cause of suffering. So where Hinduism says “find the true Self and be free,” Buddhism says “see that there is no such self, and be free.” This is not a small difference of emphasis. It is a direct contradiction at the centre of each system, and the classical schools of India argued over it for more than a thousand years.

Crack two: the Vedas

The second split is about authority. Classical Hinduism accepts the Vedas as shruti, revealed and authoritative scripture, the ultimate court of appeal in matters of dharma and truth. Indian thinkers used a simple test to sort their philosophies: schools that accepted the authority of the Vedas were called astika, and those that rejected it were nastika.

By that test, Buddhism is nastika. The Buddha set aside the authority of the Vedas and the ritual system built on them, along with the claim of the priestly class to control access to the sacred. He taught in the common tongue, invited people to test his teaching against their own experience, and founded a community open across the boundaries of birth. Jainism and the materialist Charvaka also fall on the nastika side, so Buddhism keeps company there rather than standing alone. This is the cleanest formal difference: Hinduism is a Veda-accepting tradition, Buddhism is a Veda-rejecting one. The meaning of that dividing line is explored under astika and nastika, and the shape of the Veda-accepting schools in What are the six darshanas?.

Crack three: God

The third split concerns ultimate reality and God. Most Hindu schools affirm an ultimate ground, Brahman, and most also worship a personal God, Ishvara, in one form or another. Whether as the non-dual absolute of Advaita or the personal Lord of the theistic schools, there is a highest reality at the centre.

Classical Buddhism, by contrast, is largely non-theistic. It does not deny that gods (devas) exist, but it treats them as themselves caught in samsara, powerful but unliberated, and it does not place a creator God at the centre of its account. Liberation in Buddhism does not depend on the grace of a supreme deity; it is won through the practitioner’s own insight and discipline. So the question “who is God for a Buddhist” does not have the same shape it has in Hinduism, because the Buddhist path is built without that keystone.

Moksha and nirvana: the same freedom?

Because both traditions aim at release, people often treat moksha and nirvana as synonyms. They overlap, but the nuance matters. Moksha in Hinduism is liberation from samsara through the knowledge and realisation of the Self, often described as the union or communion of atman with Brahman, an infinite fullness of being, awareness, and bliss. It is a liberation into something.

Nirvana in Buddhism literally means “blowing out,” the extinguishing of the fires of craving, aversion, and delusion, and with them the fuel of rebirth. Classical Buddhism is careful not to describe it as union with a Self or a God, precisely because it denies a permanent Self. Later Hindu texts sometimes borrowed the word nirvana, but coloured it with the Self they affirmed. So the two goals are close in shape, freedom from the wheel, and different in content, according to whether there is finally a true Self to be free.

The Buddha, claimed and unclaimed

There is a striking coda to the relationship. As Buddhism and Hinduism lived side by side for centuries, the Vaishnava tradition of Hinduism came, from around the sixth century CE, to count the Buddha as the ninth avatar of Vishnu, folding him into the Dashavatara, the ten descents of the Lord. It was, in part, a way of honouring and absorbing a powerful rival.

Buddhists, understandably, have never accepted this. For them the Buddha is an awakened human teacher, not a god and not the incarnation of one. The gesture tells you a great deal about how the two traditions related: close enough to claim each other, different enough that the claim could only ever run one way.

Cousins, not twins

So Hinduism and Buddhism are best understood as cousins raised in the same house. They share the wheel of karma and rebirth, the ideal of non-violence, the discipline of meditation, and the dream of liberation. They divide on whether there is a true Self, on whether the Vedas are authoritative, and on whether ultimate reality is a God to be known. Those are not small print. They are the load-bearing walls, and they stand in different places.

To respect either tradition is to resist the temptation to blur them into a single vague “Eastern spirituality.” Their agreements are real and deep, and so are their disagreements. Reading them side by side is one of the best ways to understand each, because each becomes clearest exactly where it refuses what the other affirms.