By God's grace, I have taken it upon myself to write down some of the principles that He taught me concerning discernment, spirit beings and walking in the realm of the spirit. So many people in Christendom have little or no knowledge at all concerning what goes on in the spiritual realm. As a result, they are not able to fight off the enemy of their soul who is out to steal, kill and destroy every human being. My hope is that people's spiritual "eyes of understanding will be enlightened" as they study the principles outlined in this manual. It is designed to help the reader understand the key principles about discerning of spirits, the origin of evil spirits, the activities of evil spirits, how to identify evil spirits and how to expel evil spirits. I also answered one of the most frequently asked question in the body of Christ today, "Can a Christian have a demon?" It is my hope and desire that by the time an average person goes through the teachings outlined in this manual, he or she will no longer be ignorant about evil spirits and about spiritual matters. I therefore, encourage you to take the lessons in this manual seriously and make a determination to apprehend the principles outlined in each lesson. May the Lord give you great revelation as you study each lesson.