Buddhism began in northern India with Siddhartha Gautama, later called the Buddha, “the awakened one.” His dates are uncertain; scholars place his life somewhere between the sixth and fourth centuries BCE, with many now favoring the fifth.

The Buddha's life in outline

According to tradition, Siddhartha was born a prince of the Shakya clan at Lumbini, in what is now Nepal. Shielded from hardship, he one day encountered four sights: an old man, a sick man, a corpse and a wandering ascetic. Shaken by the reality of suffering, he left his palace and family to seek liberation. He practiced severe asceticism, nearly starving himself, but found it did not bring insight. He then adopted a Middle Way between indulgence and self-denial, and while meditating under a tree at Bodh Gaya he attained awakening. He gave his first teaching in a deer park at Sarnath and spent some forty-five years teaching before dying, at about eighty, at Kushinagar.

The Four Noble Truths

The core of the Buddha's teaching is often compared to a doctor's diagnosis:

1. Dukkha: life involves suffering or unsatisfactoriness. Birth, aging, sickness, death and separation from what we love are painful, and even pleasures do not last.
2. The origin of dukkha: suffering arises from craving (tanha), the thirst for pleasure, for existence and for non-existence.
3. The cessation of dukkha: suffering can end when craving ends. This ending is nirvana (Pali nibbana), literally a “blowing out,” as of a flame.
4. The path: the way to that ending is the Noble Eightfold Path.

The Eightfold Path

The path has eight parts, traditionally grouped into three:

• Wisdom: right view and right intention.
• Ethical conduct: right speech, right action and right livelihood.
• Mental discipline: right effort, right mindfulness and right concentration.

“Right” here means skillful or wholesome. The path is not a series of steps to finish one by one but a set of practices to develop together.

Impermanence and no-self

Buddhism teaches three marks of existence: impermanence (anicca), unsatisfactoriness (dukkha) and no-self (anatta). Everything that arises passes away. A person is not a fixed, unchanging soul but a changing process made up of five aggregates: form (the body), feeling, perception, mental formations and consciousness. In a famous dialogue, the monk Nagasena explains to King Milinda that a chariot is not its wheels, axle or frame, nor something apart from them; “chariot” is a name for parts working together, and so is a person's name. Clinging to a permanent self, Buddhists argue, is a major source of suffering.

This teaching raises a classic puzzle: if there is no lasting self, what is reborn? Buddhists answer that rebirth is a continuity of causes, like a flame passed from one candle to another, not the travel of a soul. Karma, intentional action, shapes what follows.

Theravada, Mahayana and Zen

As Buddhism spread across Asia, it developed into major traditions. Theravada, “the teaching of the elders,” is dominant in Sri Lanka, Myanmar, Thailand, Laos and Cambodia, and preserves the Pali Canon. Its ideal is the arhat, one who has achieved liberation. Mahayana, “the great vehicle,” spread to China, Korea, Japan and Vietnam. Its ideal is the bodhisattva, who seeks awakening in order to help all beings toward liberation (often described as delaying their own final release to do so). Mahayana philosophers such as Nagarjuna developed the idea of emptiness: nothing has fixed, independent existence. Tibetan Buddhism, often called Vajrayana, grew from Mahayana roots. Zen (Chan in China) is a Mahayana school stressing meditation and direct insight, often through puzzling questions called koans.

Critics have questioned whether the claim that life is dukkha is too pessimistic, and whether no-self can support moral responsibility. Buddhists reply that the teaching aims at release and compassion, not despair.

Worked example: a broken phone

Anika saved for months to buy a new phone. Two weeks later she drops it and the screen shatters. She is furious and miserable for days. Let us look at this through the Four Noble Truths.

Dukkha. Her suffering is real. But notice that even before the phone broke, there was a quieter dukkha: worry about scratches, and the knowledge that a newer model would soon appear.

The origin. The pain is not just the broken glass. It is the craving and clinging attached to it: “It should not have happened. It was mine. I am the kind of person who has a perfect phone.” Her distress is bound up with a sense of self wrapped around the object.

Cessation. A Buddhist teacher would not say the loss is meaningless. But the suffering can lessen as the clinging loosens. Seeing that everything is impermanent, including phones, moods and the self who is upset, can bring a kind of freedom.

The path. Practically, Anika might use right mindfulness to notice her anger without feeding it, right speech to avoid snapping at her brother, who was nearby when she dropped it, and right view to see the situation more clearly.

Notice what the example does not claim. Buddhism does not tell Anika to stop caring, or to pretend she is calm. It offers a diagnosis of how suffering builds on top of events, and a path for loosening it. A critic might still ask whether some attachments, such as love for people, are worth the suffering they bring. Buddhist teachers have answered in different ways, and Mahayana compassion is one of those answers.