We saw that according to Romans 1:19–20 God is clearly revealed in the created world. So everybody knows that God exists, and they know quite a bit about him as well (“his eternal power and divine nature,” verse 20). And it’s not only that they know some things about God; they know him (verse 21, “for although they knew God …”). So their knowledge of God is not only a knowledge of facts; it is knowledge of a person, as friends know friends and enemies know enemies. So