We are often ashamed of the gospel because we doubt its power to convince a skeptic or convert a sinner.
A firm belief in the redemptive and explanatory power of the gospel is precisely why the Apostle Paul said he was not ashamed:
“For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek. For in it the righteousness of God is revealed from faith for faith, as it is written, ‘The righteous shall live by faith.'” (Romans 1:16)
All of reality is explained through the gospel, as Paul says, “In it the righteousness of God is revealed…” In the gospel we make sense of the questions that plague us the most like “Where did we come from?”, “What is the purpose?” and “Where are we going?”
That’s why Larry King chose Jesus Christ when asked if he could pick only one person from the past to interview. The one question he would ask is, “Were you virgin born?” According to King, the answer to that question would explain all of human history. And so it does.
The gospel not only answers our deepest philosophical questions, it is the catalyst of God’s redemptive work on earth. Paul called it the “power of God unto salvation.” This power is accessed through an understanding and acceptance of real-time historical events, namely the resurrection of Jesus. That’s why everyone, Jew or Gentile, who places their faith in the historical work of Christ receives the forgiveness of God.
The gospel is the power of God to explain reality and to atone for sins. Of this we need not be ashamed.