Posadha, also spelled Poshadh or Pausadha, is a vow of temporary renunciation in which a Jain householder withdraws from ordinary worldly life for a fixed period, usually a day and night, and adopts the disciplines of an ascetic. The word carries the sense of nourishment or spiritual sustenance, and the observance is understood as a means of nourishing the soul by setting aside for a time the occupations, comforts and attachments of everyday existence. It is counted among the vows that a devout layperson may undertake and is one of the most demanding of the disciplines available to those who have not renounced the world entirely.
During the period of the vow the practitioner leaves behind the roles and activities of household life. Business, cooking, adornment and the ordinary pleasures of the senses are given up, and the practitioner lives instead by the rules that govern monastic conduct. Fasting is generally kept, often a complete fast taking only boiled water, and the day is passed in a place of retreat, frequently the temple hall or the upashraya where ascetics reside. Plain garments are worn, comforts are forsworn, and the practitioner sleeps, if at all, on a simple surface, avoiding the softness of ordinary bedding.
The time thus freed from worldly concern is devoted to spiritual practice. The practitioner performs Samayika, the discipline of equanimity, over extended periods, keeps Pratikraman, the ritual of reflection and repentance, at the appointed times, recites sacred formulas and studies scripture. Care is taken in every action to avoid harm to living beings, and movement, speech and even the disposal of the body's needs are governed by the vigilance that ascetic discipline demands. The whole period becomes an immersion in the practices that fill the life of a monk or nun.
Posadha is traditionally kept on days of particular sanctity in the Jain calendar, especially the days of the changing moon within the fortnight and during the great festivals. Many devotees undertake the vow during Paryushana and Das Lakshana, when the spiritual atmosphere of the community lends support to the discipline, and some keep it regularly on the appointed days throughout the year. The vow may be taken for a full day and night or, in shorter forms, for part of a day.
The significance of the observance lies in the experience of renunciation that it offers to those still living in the world. Jain teaching holds the ascetic life to be the surest path to liberation, yet recognises that most cannot forsake all worldly ties. Posadha provides a bridge, allowing the householder to taste, for a day, the freedom of the renunciant, to loosen the grip of possessions and appetites, and to discover the peace that comes from setting the world aside. In doing so it strengthens the practitioner's aspiration toward the higher discipline and deepens understanding of what the ascetic life entails.
Posadha thus stands as one of the most valued of lay observances, a voluntary and temporary renunciation that brings the household devotee, for a time, into the way of life of the monk. Its recurring practice on the sacred days of the calendar keeps the ideal of renunciation present within lay life and offers each practitioner a regular occasion to withdraw from the world, to purify conduct, and to turn wholly toward the concerns of the soul.