Dr. Jeff delivered a sermon titled "Difference Makers" in the series "Built to Last," emphasizing the importance of impacting future generations and being a light for God. He encouraged believers to use their gifts to build up the body of Christ and serve willingly and joyfully. The sermon highlighted biblical examples of difference makers and the value of those who serve behind the scenes. Dr. Jeff concluded by honoring the faithfulness of previous generations and calling the congregation to reflect on their spiritual foundation.