What is the “gospel”?
The gospel is simply the truth about the life, death, and resurrection of Jesus.
The gospel tells us the truth about God. He created the world and everything that is in it (Gen. 1-2). Since he is the creator his attributes are clearly perceived and all mankind is without excuse (Rom. 1:20).
The gospel tells us the truth about man. God created man as the climax of creation as his image bearer and royalty to rule and reign over the world (Gen. 1:26-27). God had a unique relationship with mankind until they disobeyed God (Gen. 3:6-7) thus severing the perfect relationship and unity. All mankind now turns to idols and worships the creation rather than the creator and has exchanged the truth of God for lies (Rom. 1:21-23). Due to this sin all mankind deserves the just punishment and consequences of the wrath of God (Rom. 1:18; 2:4-5). In their sins all mankind is dead (Eph. 2:1).
The gospel tells us the truth about Jesus Christ. God the Father has given Jesus Christ as the atoning sacrifice for sins and he took on the wrath of God by substituting himself in the place of sinful man (Rom. 3:21-25; 2 Cor. 5:21). Through faith in the Lord Jesus mankind is justified by grace as a gift (Rom. 3:24).
The gospel demands a response. The gospel is not simply information but it must be believed in and trusted for salvation (Rom. 3:22).
The gospel of Jesus Christ is the centerpiece and climax of the entire Scripture.
1 Corinthians 15:1
15 Now I would remind you, brothers,[a] of the gospel I preached to you, which you received, in which you stand, 2 and by which you are being saved, if you hold fast to the word I preached to you—unless you believed in vain.
3 For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, 4 that he was buried, that he was raised on the third day in accordance with the Scriptures, 5 and that he appeared to Cephas, then to the twelve. 6 Then he appeared to more than five hundred brothers at one time, most of whom are still alive, though some have fallen asleep.