Tīrtham — Sacred Water and the Ford Across Saṃsāra
Tīrtham (Sanskrit: tīrtha = ford or crossing-place, from the root tṝ, 'to cross'; hence sacred water or holy site) has a rich, multi-layered meaning in the Śrī Vaiṣṇava tradition. At the immediate practical level, it denotes the sanctified water distributed during or after temple tiruvārādhanam, commonly with tulasī. It is received as Bhagavān's tiruvaḍi-tīrtham or caraṇāmṛtam, but it need not be water collected from an abhiṣeka; the precise preparation and offering follow the temple's Āgamic procedure. Devotees receive it reverentially as prasāda and divine blessing. The imagery of water from Bhagavān's feet is also associated with Gaṅgā as Viṣṇu-padī.
At a second level, tīrtham refers to sacred rivers and to temple tanks (puṣkariṇīs or tīrtha-kuṇḍas) where such water bodies form part of a shrine's inherited sacred geography. Their names and the rules governing bathing or ritual use are temple-specific; not every major Āgamic temple has one identical arrangement. Tirumalā's principal tank, for example, is Svāmi Puṣkariṇī, while Śrīraṅgam has Candra Puṣkariṇī. At a third level, tīrtha designates a pilgrimage site (kṣetra) — a holy place where the divine is especially accessible and where saṃsāra may be symbolically 'crossed'. The 108 divya-deśams are all tīrtha-kṣetras — places where the Āzhvārs' own experience of Bhagavān's presence has permanently sanctified the land. The very word tīrtha captures the soteriological metaphor central to the tradition: saṃsāra is an ocean (bhava-sāgara) and the devotee must cross it; a tīrtha is the ford, the crossing-place provided by Bhagavān's grace.
In Viśiṣṭādvaita theology and Śrī Vaiṣṇava tradition, the concept of tīrtham is extended to the Āchārya's tīrtha — water from the Āchārya's feet (guru-pāda-tīrtha). The Āchārya, as the representative of Bhagavān's grace in this world, dispenses a blessing through foot-water equivalent to the deity's caraṇāmṛtam. The practice of receiving the Āchārya's tīrtha (guru-pādāmbu or guru-caraṇāmṛta) is considered especially purifying for the prapanna (surrendered devotee) — because the Āchārya is the direct channel through whom Bhagavān's grace flows to the soul. Piḷḷai Lokācārya in Śrī Vachana Bhūṣaṇam emphasizes that the Āchārya's grace (āchārya-kṛpā) is the proximate cause of liberation, and the Āchārya's tīrtha is a physical symbol of receiving that grace.