In this sermon on the first commandment, we consider: there is a God; there are no other gods, and that only God must be our God. The sermon demonstrates why so many believe in a god and clarifies that while false gods and idols have no real existence, modern substitutes such as money, worldly pleasures, self-confidence, and even possessions or family can become functional gods when we look to them for security, joy, meaning, or salvation. Because of who God is and what he has done, we are called to exclusive loyalty, wholehearted trust, worship, loving fear, and deep satisfaction in him alone. May you be encouraged to follow this first commandment for your good and God’s glory!