Keshub Chandra Sen was a Hindu philosopher and social reformer who attempted to incorporate Christian theology within the framework of Hindu thought. Born a Hindu in the Bengal Presidency of British India, he became a member of the Brahmo Samaj in 1857 but established his own breakaway "Bharatvarshiya Brahmo Samaj" in 1866 while the Brahmo Samaj remained under the leadership of Debendranath Tagore. In 1878, his followers abandoned him after the underage child marriage of his daughter which exposed his campaign against child marriage as hollow. Later in his life he came under the influence of Ramakrishna and founded a syncretic "New Dispensation" inspired by Christianity, Vaishnav bhakti, and other Hindu practices.

Ramakrishna, also called Ramakrishna Paramahansa, born Gadadhar Chattopadhay, was an Indian Hindu mystic. A devotee of the goddess Kali, Ramakrishna after adhering to various religious practices from the Hindu traditions of Vaishnavism, Tantric Shaktism, and Advaita Vedanta, as well as from Islam and Christianity, proclaimed that various world religions are "so many paths to reach one and the same goal", thus validating the essential unity of religions. His parable-based teachings espoused the ultimate unity of diverse religions as being means to enable the realization of the same God. He is regarded by his followers as an avatar or divine incarnation of God.