The Foundational Doctrine Text
Tattva-trayam grantham (the 'text on the three realities') is one of Piḷḷai Lokācārya's 18 Rahasya Granthams — the systematic Teṉkalai exposition of the three fundamental ontological categories of Viśiṣṭādvaita Vedānta: chit (sentient beings), achit (non-sentient matter), and Īśvara (the Lord, Śrīman Nārāyaṇa).
Content and Structure
The text proceeds systematically through:
- Chit — the nature of individual souls: their essential nature (svarūpa), their qualities, their relationship to Brahman, the three classes (nitya, mukta, baddha), karma and saṃsāra
- Achit — the nature of matter: the three kinds (śuddha-sattva, miśra-sattva, kāla), the five elements, the subtle body, the relationship to Brahman
- Īśvara — the nature of Brahman: His qualities (kalyāṇa-guṇas), His forms (five manifestations), His relationship to chit and achit through śarīra-śarīrī-bhāva
Place in the Curriculum
In the traditional Śrī Vaiṣṇava kalakṣepam (exposition) curriculum, Tattva-trayam is typically the first rahasya grantham taught after the fundamentals — it provides the ontological framework within which the other granthams (Mumukṣuppadi, Srivachana Bhushanam, etc.) operate. Maṇavāḷa Māmunigaḷ's commentary is the standard study guide.
Relationship to Rāmānuja's Works
Piḷḷai Lokācārya's Tattva-trayam draws heavily on Rāmānuja's Vedārthasaṅgraha and Śrī Bhāṣyam but presents the teachings in accessible Maṇipravāḷam (Tamil-Sanskrit), making the philosophy available to those without Sanskrit expertise.