""A Summary of the Law of Christ: Or the Duty and Happiness of Man"" is a book written by Josiah William Smith in 1859. The book is a comprehensive guide to the teachings of Christ and their relevance to human life. It explores the concept of duty and happiness and how they are intertwined in the Christian faith. The book covers a wide range of topics, including the nature of God, the role of Christ in salvation, the importance of prayer and worship,...