The Church of South India (CSI) affirms that the purpose of the union is to fulfill the priestly prayer of Jesus Christ, the Lord of the Church "That they all may be one, and that the world may believe that you have sent me". And the Church of South India would become an effective instrument of God's mission so there will be greater peace, closer fellowship and fuller life in the Church and a renewed commitment for the proclamation of the Gospel of Jesus Christ through word and deed.