This sermon addresses the Thessalonian believers' misunderstanding regarding the timing of the Day of the Lord, correcting their fear that they were already in a time of divine judgment. The preacher explains that specific prerequisites, namely a great falling away and the revelation of the man of sin, must occur before this period begins, thereby offering comfort by confirming they are not currently under God's wrath. By analyzing Old Testament prophecies and the role of the Holy Spirit, the text clarifies that the Antichrist cannot be revealed until the restraining influence is removed. The message emphasizes that salvation rests on believing the truth, while those who reject it will face strong delusion. Ultimately, the sermon urges Christians to stand firm in their faith and live steadfastly, anchored by the hope of Christ's return.