In this book, Matthew Mead shows twenty ways that a person can be deceived into thinking he is a Christian when he really is just an "almost Christian". Mead also explains important topics like the need for self-examination, signs of the unpardonable sin, and reasons for a believer's lack of comfort. He concludes with three matters that every reader must be convinced of: the evil and filthy nature of sin, the misery and desperate danger of the unregenerate, and the utter insufficiency and inability of anything other than Christ Jesus to minister relief. This Puritan classic is meant to shake nominal believers out of their complacency and to comfort true believers.