With informed readings of scripture, Horatius Bonar discusses the teachings central to Christianity, and the good Christian's relationship to the divine.

Various topics are covered in this book's chapters, such as the importance of strengthening the soul to guard against sin, the symbolism and holy power of the crucifix, and how Christ's spirit dwells within Christians, lending support and resolution through times of hardship. What holiness is, and its ancient origins in mankind's interactions with the Lord and his messengers, is detailed

Throughout this study, Horatius Bonar's scholarship is in the fullest evidence. Definitive and emphatic in his guidance, the words are delivered straightforwardly, with little dwelling on the obscure. Primarily through the use of the New Testament scripture, the author seeks to confer an understanding of Christian principles and the veneration of God. Particular attention is paid to the book of Romans, with the interpretations of the Apostle Paul taken as a foremost source of clarity.

Though the author was primarily known in life for his hymn writing, in manuals such as these his depth of Biblical knowledge is evident. Working as a minister in the Church of Scotland for several decades, Bonar's scholarly activities were acknowledged with an honorary Doctor of Divinity degree issued by the University of Aberdeen.