The moment
At the temple town of Śrīraṅgam, Rāmānuja gave devotion to a personal God a rigorous philosophy. Against Śaṅkara he taught Viśiṣṭādvaita, 'qualified non-duality': souls and the world are real, and they form the body of Viṣṇu, whom the soul exists to serve.
People: Rāmānuja