This is without doubt the best known and most loved of Samuel Logan Brengle's eight books. The simplicity, straightforwardness and clarity with which the book deals with the subject of holiness and holy living have caused it to be a blessing to generations of Christians. "If I could," wrote Dennis F. Kinlaw, "I would get every new Christian to devour this book. It would help establish him in the deep things of God. The older believer should read it too. It will take him back to basics. It will rob him of all comfort of life that is less than 'sanctified and meet for the Master's use.' " The chapters found here originally appeared as articles in the Salvation Army periodical, the War Cry. They were written while Brengle was recuperating from a serious injury incurred when he was hit in the head by a paving brick thrown by a drunkard.
Samuel Logan Brengle (1860 - 1936) was converted as a youngster. At fifteen years of age he became assistant Sunday School superintendent in his home church, and at seventeen he enrolled in DePauw University, where he proved to be a brilliant scholar and an eloquent orator. Political ambitions soon began to awaken in Brengle's heart, but these were short-circuited when God called him to be a preacher of the gospel. From DePauw, Brengle went to Boston Theological Seminary. It was here that he experienced a life-changing experience of heart cleansing under the guidance of Dr. Daniel Steele. Soon afterwards Brengle refused the flattering offer of the pastorate of a large, renowned Methodist church, choosing instead to join the Salvation Army, where he spent the rest of his life as a traveling evangelist, writer and holiness preacher.