The central message of this sermon is that the traditional understanding of divorce and remarriage as merely a matter of legality has been misconstrued, leading to a pervasive problem of adultery. Jesus' teachings in Matthew 5:31-32 and other passages are often seen as promoting a simplistic view of divorce as a legal certificate that automatically dissolves the marriage covenant. However, this sermon argues that such an understanding is fundamentally flawed, as it neglects the inherent moral implications of divorce and remarriage. The speaker emphasizes that Jesus' teaching on divorce is not just about the technicalities of legality but about the heart of the matter: the marriage covenant. By pointing out the irony that even with a certified and legal divorce, individuals can still be committing adultery against their former spouse, the sermon highlights the gravity of this issue and encourages listeners to re-examine their understanding of marriage and divorce. The takeaway is not just a call for moral reform but an invitation to recognize the profound consequences of divorce on all parties involved.