The Spirit of the Antichrist is in the Church.

The Bible warns in second Thessalonians chapter 2:1-11 about the events surrounding the second coming of Christ that we are not to be shaken in mind or troubled in spirit but to be careful of deception. It details the deceit, the falling away, and the revelation of the lawless one. It also mentions that the mystery of lawlessness is already at work. This mystery is the spirit of the antichrist cited in first John 4:1-6, manifested in opposing ideologies to the biblical worldview introduced into the church by persons, i.e., wolves in sheep's clothing, who personify this spirit. This book is meant to edify the body of Christ on how to discern the spirit of error and her schemes by emphasising the importance of the Word of God and His glory.