An Enquiry into the Obligations of Christians to Use Means for the Conversion of the Heathens / In Which the Religious State of the Different Nations of the World, the Success of Former Undertakings, and the Practicability of Further Undertakings, Are Considered

The author argues that Christians remain bound by the Great Commission and must actively use organized, lawful means to spread the gospel to non-Christian nations. He reviews the religious condition of different peoples, summarizes past missionary efforts and their successes and failures, and rebuts common objections to missionary activity, including claims that apostolic authority was unique. Practical considerations receive attention: the feasibility of further undertakings, methods such as translations, education, and itinerant preaching, and the responsibilities of churches, ministers, and private Christians to support and engage in evangelistic work.