Nine Modes of Devotion
Navadhā-bhakti ('ninefold devotion') is the enumeration of nine modes of bhakti taught by the sage Prahlāda in the Bhāgavata Purāṇam (7.5.23–24): (1) śravaṇa — hearing the Lord's name, form, and pastimes; (2) kīrtana — singing His praises; (3) smaraṇa — constant remembrance; (4) pāda-sevana — service at the feet; (5) arcana — flower-offering worship; (6) vandana — salutation and prostration; (7) dāsya — servanthood; (8) sakhya — friendship; (9) ātma-nivedana — complete self-offering.
The Āzhvārs as Models
Each of the twelve Āzhvārs exemplifies one or more of these nine modes. Poygai, Bhūtatāzhvār, and Peyāzhvār represent different aspects of śravaṇa and smaraṇa; Toṇḍaraḍippoḍi Āzhvār exemplifies pāda-sevana; Maturakavi Āzhvār exemplifies a form of ātma-nivedana to the ācārya; Nammāzhvār encompasses virtually all nine. Each form is complete in itself — any one of the nine, practiced purely, leads to the Lord.
Accessibility
The genius of the navadhā-bhakti teaching is its accessibility: someone with a beautiful voice can practice kīrtana; someone with analytical gifts can practice smaraṇa; someone naturally disposed to service can practice pāda-sevana or dāsya. The Lord accepts all nine modes equally, without preference for the externally impressive over the internally sincere.
Relation to Prapatti
In Sri Vaishnava theology, prapatti (śaraṇāgati) is not one of the nine modes but the act of surrender that makes all kaiṅkarya (service, worship) possible. The nine modes are the content of devotional life after surrender — the ways of expressing the love and gratitude of one who has already taken refuge.