In this sermon, the preacher begins by expressing gratitude for the opportunity to teach children about salvation. He mentions that he and his family come from the Faroe Islands, which are located in a cold part of the world. The preacher emphasizes the power of the gospel in transforming lives and nations, stating that no other message or philosophy can compare. He then discusses the concept of judgment day and how God has appointed a specific day for judgment, with Jesus Christ as the appointed judge. The sermon concludes with a reference to Paul's preaching on Mars Hill in Athens, where he spoke about repentance and the resurrection of the dead.