The monastic code

The Vinaya is the body of monastic discipline — the rulebook governing the life of Buddhist monks and nuns. Its name carries the sense of "discipline" or "training," what leads a person away from harmful conduct and worldly entanglement. Together with the Buddha's discourses (the sūtras), it forms one of the two oldest layers of Buddhist scripture, and tradition holds that the rules were laid down by the Buddha himself, one at a time, in response to actual problems that arose in the early community.

The Vinaya is remarkably detailed and concrete. At its heart is the Pātimokkha (Sanskrit prātimokṣa), the core list of training rules — a few hundred of them — that ordained members recite together at the twice-monthly observance day. The rules range from the gravest down to fine points of etiquette about robes, food, and how to conduct oneself in a village. The four most serious offenses (such as sexual intercourse, serious theft, killing a human being, or falsely claiming spiritual attainments) bring "defeat": a monk or nun who commits one of them permanently and automatically loses their ordained standing. Beyond the bare rules, the Vinaya also preserves the procedures of communal life: how to ordain new members, settle disputes, keep the rainy-season retreat, and reach decisions as a group. In this way it functions as the constitution of the Saṅgha, the monastic community.

Because Buddhism spread across many lands and schools, the Vinaya survives in several closely related versions — the Theravāda Vinaya followed in South and Southeast Asia, and others such as the Dharmaguptaka (used in East Asia) and the Mūlasarvāstivāda (used in Tibetan Buddhism). They differ in small details but agree on the essentials. For more than two thousand years, this shared discipline — rather than a central authority or a single head — is what has held the monastic order together and given it its remarkable continuity and trust.