This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Where Shankara resolves the relation between Brahman and the world by ultimately declaring the world's separateness illusory, Ramanuja resolves the same relation by generalizing a single model, the relation between a soul and its body, until it covers the whole of reality. His technical term for this is sharira-shariri bhava, the relation of embodied thing to embodier, and he does not confine it to the ordinary case of a human self animating a human body. Ramanuja argues that this same relation holds, one level up, between every individual soul, every material object, indeed the entire universe taken together, and Brahman, because we, along with all individuals, constitute modes or qualities of Brahman's own body, so that Brahman stands to all others as the soul or mind stands to its body. Just as a person's body is real, is genuinely distinct from the person's self, and yet has no independent purpose or existence apart from serving as the instrument of that self, so the whole of conscious and unconscious creation stands to Brahman as body to indwelling self. Ramanuja can therefore affirm, against Shankara, that individual souls and material things are fully real and permanently distinct from Brahman and from each other, while still affirming the strict Vedantic teaching that Brahman alone is the one reality on which everything depends, since a body's reality never competes with its soul's priority over it. This is the substance of his Vishishtadvaita, nonduality qualified by real internal distinctions, and the body self model is what lets him hold both halves of that formula at once rather than collapsing, in one direction, into monism or, in the other, into an unrelated dualism of independent substances.
The model does real philosophical work beyond cosmology, because it lets Ramanuja treat the plurality that ordinary experience reveals, many souls, many objects, a changing world, as something Brahman positively requires rather than something that has to be explained away as ignorance. And this connects to his epistemology, where Ramanuja defends the reliability of ordinary perception against the rival claim that the entire perceived world is maya, ultimately no more real than a rope mistaken for a snake. His argument begins from a claim about the nature of consciousness itself, that awareness, dharmabhutajnana, is always awareness of some object possessing determinate qualities, never a pure undifferentiated glow of consciousness without content. If every act of knowing necessarily discloses an object with real, specific features, then the qualities and the plurality that perception delivers cannot be dismissed as a later imposition on an originally featureless awareness, since awareness was never featureless to begin with. Where a rival Vedantin needs a special intermediate category to describe what perception shows while insisting that inquiry ultimately overturns it, Ramanuja simply takes perception at its word and builds an epistemology, close in spirit to a straightforward realism, in which even a case of misperception is explained without denying that the world it misperceives is real, since what goes wrong in error is that the qualities presented, though real qualities existing somewhere, are misattributed to the wrong object rather than manufactured from nothing.
This philosophical architecture did not stay confined to commentary and debate. It became the doctrinal skeleton of Sri Vaishnavism as a living tradition, still practiced today, in which Ramanuja is revered as the great systematizer of the community's Tamil devotional inheritance, the verses of the Alvar poet saints, and in which surrender to Vishnu, prapatti, follows naturally from the metaphysics, since a body that exists solely to serve its soul has, philosophically, nothing more fitting to do than offer itself entirely to the self it depends on. The tradition's later split into northern and southern schools, disagreeing over how much the soul must contribute to its own surrender, is best understood as an argument conducted entirely within the terms Ramanuja set, evidence of how completely his body soul model came to organize not just the metaphysics but the devotional self understanding of the community that carried his philosophy forward long after the technical disputes with Advaita had receded from most believers' daily concern.