Romans 1:18-20 — God will punish sin. Sin never escapes His notice and He will pour out His wrath on it. In this sermon titled “Their Foolish Heart was Darkened,” Dr. Martyn Lloyd- Jones furthers the study of God’s wrath in this sermon on Romans 1:18–20 and shows the inexcusability of sin. Dr. Lloyd-Jones warns that humanity cannot plead ignorance since God put in the heart a universal knowledge of right and wrong, His existence, and His holy standard. In what ways has this knowledge been revealed? It is in both general and special revelation. In great detail, Dr. Lloyd-Jones explains what these two types of revelation look like and how unbelievers suppress the truth and fight against it. The fundamental cause of rebellion is pride and overall wickedness. Atheists claim there is no God, but are only denying what He put both in their hearts and in all of creation. The next step after pride is for the Lord to lead hearts out of darkness. The Bible says that without Christ, there is darkness, but because of Christ’s sacrifice on the cross, there is now light with the Lord.