In short chapters, he has recounted numerous true stories, apparitions of the damned, and complete Catholic teaching on Hell. He clearly shows that for those who are not motivated to do good out of love of God, the fear of Hell is a legitimate and often salutary motive for avoiding sin.
Although the subject matter is frightening, the ultimate purpose of this book is not to frighten souls, but to help them avoid damnation by reminding them of the pain and suffering in an eternity spent in the absence of God.