What Does John Mean When He Writes About the Antichrist?

Dr. Constantinou discusses the Epistles of John. These Epistles are the only place in the New Testament where the word "antichrist" appears. What prompted John to talk about the antichrist? What was the situation in the Church at that time? The first epistle of John also contains some of the most memorable and beautiful verses in the Bible, which have inspired beautiful patristic statements.