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The Bhakti movement refers to the theistic devotional trend that emerged in medieval Hinduism and later acted as the de facto catalyst to the formation of Sikhism. It originated in eighth-century south India (now Tamil Nadu and Kerala), and spread northwards. It swept over east and north India from the 15th century onwards, reaching its zenith between the 15th and 17th century CE.

The Bhakti movement regionally developed around different gods and goddesses, and some sub-sects were Vaishnavism (Vishnu), Shaivism (Shiva), Shaktism (Shakti goddesses), and Smartism. Bhakti movement preached using the local languages so that the message reached the masses. The movement was inspired by many poet-saints, who championed a wide range of philosophical positions ranging from theistic dualism of Dvaita to absolute monism of Advaita Vedanta.

The movement has traditionally been considered as an influential social reformation in Hinduism, and provided an individual-focused alternative path to spirituality regardless of one's birth or gender. The Bhakti movement began with the aim of reforming Hinduism. Postmodern scholars question this traditional view and whether the Bhakti movement ever was a reform or rebellion of any kind. They suggest Bhakti movement was a revival, reworking and recontextualisation of ancient Vedic traditions. Bhakti refers to passionate devotion (to a deity).