1. Neither glorified God nor gave thanks to him (18-23)

Human beings need the gospel that has the power to save them, for they are under God's wrath by their godlessness (no God in their hearts: neither glorify God nor give thanks to him) and wickedness (cut off from God, the source of all goodness, then all kinds of evil activities done toward others). We have no excuse saying, "I could not know God," for the creator God made men in his image. We are to know him in our conscience, God's innate image. It is plain to see his power and divinity through awesome nature too. Most of all we have the very written word of God translated in our language easy to access with just one click. But by removing God men became proud. They became foolish and ignorant to worship men, animals, and materials rather than God.

2. God's wrath (24-32)

As children abandoned by their parents could be the worst punishment, so God's wrath was to leave men to live without God, the source of life and all goodness. Men became like cut off branches, with no goodness in them but live according to their sinful depravity: sexual impurity, idol worship, God-haters, arrogant and boastful. They all became factories of evil. They even approve of those who practice evil.