T. Austin-Sparks emphasizes the enduring significance of the voices of the prophets, particularly through the story of Jeremiah's two rolls. He illustrates how the first roll, representing God's original message, was destroyed by King Jehoiakim, yet God spoke again through the second roll, underscoring that divine truth cannot be extinguished. The sermon warns against the consequences of rejecting God's revelations, as seen in the historical context of Israel and the Apostle Paul's experiences. Sparks highlights that neglecting God's voice leads to judgment, while the re-emergence of His message calls for repentance and acknowledgment. Ultimately, the sermon serves as a reminder that God's truth will always resurface, and our response to it determines our spiritual destiny.