This passage introduces the doctrine of sin and indicts the whole world as guilty before God. However, Romans 1 isn’t about sins out there that other people are guilty of. It is about the rebellion inside us, that we are guilty of.
(1) God is shouting out his existence, but the human family has tuned him out.
(2) We deliberately suppress the knowledge of God.
(3) Human rebellion against the Creator takes many forms and infects us all.
(4) Human society applauds—and even evangelizes for—rebellion against God.
(a) It’s time to leave behind an “us vs. them” mindset.
(b) It’s time to present the gospel with urgency.
(c) It’s time to turn from your sin and turn to Christ.