Alexander Duff explains how missionary work is the very heart and purpose of the organized Christian church.
For the author, the establishment and undertaking of church missions is a pursuit which must be undertaken with greater energy and priority. The aim of the mission - to spread the word of Jesus Christ across the world - is encapsulated in the Bible quotations that populate the pages of this simple yet rousing work.
Simply put, God's word and spiritual truth is meant for all nations - Christianity's holy doctrine cannot be confined to a region or select continents. Rather the message of Christ as the Messiah should be spread and established in all corners of the Earth. The Bible alludes to the world in this context, with the New Testament and words of Jesus himself vowing to spread the truth of the message to all places.
The author's words and idea for the future of Christianity were born from his own lengthy career as a missionary. Born and educated in Scotland, Alexander Duff became one of the most successful missionaries in India, whose accomplishments ranged from helping establish the University of Calcutta, to influencing education policy of the Indian nation.