How do we know God reveals Himself to His people?

The sermon emphasizes that knowledge of God comes through His sovereign revelation, where He chooses to reveal Himself to certain individuals, much like Eli and Hannah experienced. The understanding that some know God while others do not underscores the doctrine of election, central to Reformed theology. The revealed truth of God through scripture, coupled with personal experience, affirms that God is actively involved in the lives of His chosen people. As stated, one cannot know Him unless He chooses to reveal Himself, reflecting the grace and mercy that is foundational to those who believe.