At a time in England when loyalty to Scripture placed Christians in the center of the nation's wars, Gurnall was more concerned with the souls of his people than the issues of conflicting political parties. Compiled from his many sermons on "the saints' war against the devil," his exhaustive exposition of Ephesians 6:10-20 treats the spiritual battles of believers and their God-given protection.

Originally written in three volumes (1655-1662), the book first covers the Christian's call to arms and describes the nature of the battle and the character of our enemy. The various pieces of...