How do we know who to believe when so many voices claim to have the answers to life's deepest questions? In this sermon, Leon Pretorius opens a study on the doctrine of revelation, showing that fallen humanity cannot reason or experience its way to truth — God must speak. Drawing from Psalm 19, Hebrews 1, Ephesians 2, and 2 Timothy 3, Leon traces God's progressive self-disclosure from the Old Testament prophets through His Son, and demonstrates why the Bible — as inspired, sufficient, necessary, clear, and inerrant — remains the only authoritative answer to every fundamental question of life.