This volume contains more than the title reveals. Prefaced to a 230-page exposition of the Lord's Prayer, Witsius devotes six chapters to the subject of prayer in general, which he calls the pulse of the renewed soul. His exposition on the Lord's Prayer is itself a masterpiece. In many instances, the questions grappled with receive greater scriptural and practical clarity from Witsius' pen than from anything else written to date. Sound biblical exegesis and practical doctrinal substance, this book represents the cream of Reformed theology.