Sadhu

A sadhu has formally renounced ordinary household life, family ties and personal property to pursue moksha, liberation, through ascetic practice, pilgrimage and meditation, a life stage many Hindu traditions treat as the culmination of the four-stage ashrama scheme, though sadhus themselves span considerable diversity in their specific practices, philosophical affiliations and degree of asceticism, from wandering mendicants entirely dependent on alms to sadhus affiliated with organized monastic orders and akharas maintaining fixed residences at particular ashrams or temples. Initiation as a sadhu, diksha, is conferred by an existing guru and typically involves formal renunciation rites, including, in some traditions, symbolic rituals treating the initiate's prior worldly identity as having died, a practice paralleling similar rites of symbolic death and rebirth found in the closely related swami initiation within the Dashanami order.

Sadhus are broadly divided into Shaiva sadhus, devoted to Shiva and often organized into akharas historically associated with martial as well as religious training, and Vaishnava sadhus, devoted to Vishnu and his avatars, each tradition maintaining its own distinct practices, insignia, such as the specific pattern of ash or sandalwood paste markings worn on the forehead and body, and organizational structures, so that identifying a sadhu's specific sectarian affiliation is often possible simply from these visible markers.

Naga sadhus, a distinct category of Shaiva ascetic historically associated with martial training and, in earlier centuries, with armed defense of pilgrimage routes and religious sites, are recognized by their practice of remaining unclothed and covering their bodies with ash as a mark of their extreme renunciation, undertaking a particularly demanding initiation process that can extend over years and includes specific tests of physical and spiritual discipline before full acceptance into a naga akhara. Naga sadhus and other akhara-affiliated ascetics gather in especially large numbers at the Kumbh Mela, a major pilgrimage and bathing festival held on a roughly twelve-year cycle rotating among four sacred river sites in India, where the ceremonial bathing procession of different akharas, each entering the sacred waters in a strict, traditionally negotiated order of precedence, forms one of the festival's most visually striking and closely organized events.

The Kumbh Mela, recognized by UNESCO as an element of humanity's intangible cultural heritage, draws tens of millions of pilgrims and represents one of the largest peaceful gatherings of people anywhere in the world, and the sadhu and akhara presence at the festival provides one of the most visible and sustained points of contact between India's wandering ascetic tradition and the wider lay public, most of whom encounter sadhus specifically in this festival context rather than in the more dispersed, individual wandering life many sadhus lead the rest of the year.