CSI meaning in Community ?

The Church of South India (CSI) is a united Protestant Church, being the second-largest Christian church in India based on the number of members; it is the result of union of a number of Protestant churches in South India.

The Church of South India is the successor of a number of Protestant denominations in India, including the Church of England, Church of India, Burma and Ceylon (Anglican), the United Church of Christ (Congregationalist), the British Methodist Church and the Church of Scotland after Indian Independence. It combined the South India United Church (union of the British Congregationalists and the British Presbyterians); the then 14 Anglican Dioceses of South India and one in Sri Lanka; and the South Indian District of the Methodist church. With a membership of nearly four million, CSI is one of four united Protestant churches in the Anglican Communion, the others being the Church of North India, the Church of Pakistan and the Church of Bangladesh; it also is a member of the World Methodist Council and World Communion of Reformed Churches.

The inspiration for the Church of South India was born from ecumenism and inspired by the words of Jesus Christ as recorded in the Gospel of John (17.21). Just like the United Church of Christ (Congregationalist), one of their forebearer denominations, their motto is:

That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.'

"That they all may be one" is also the motto of the Church of South India.