The word gospel means “good news,” so the gospel of Christ is the good news of His coming to provide forgiveness of sins for all who will believe (Colossians 1:14; Romans 10:9). Since the beginning of time when the first man sinned, mankind has been under the condemnation of God (Romans 5:12). Because everyone breaks God’s perfect law by committing sin (Romans 3:23), everyone is guilty (Romans 5:18). The punishment for the crime of sin is physical death (Romans 6:23) and then an eternity spent in a place of eternal punishment (Revelation 20:15; Matthew 25:46). This eternal separation from God is also called the “second death” (Revelation 20:14–15).
The fact that all are guilty of sin and condemned to spend eternity in a place of torment is very bad news. But God, because of His love for the world, has made a way for man to be forgiven for their sins (John 3:16). He sent His Son, Jesus Christ, to take the sins of man on Himself through death on a cross (1 Peter 2:24). In placing our sin on Christ, God ensured that all who will believe in the name of Jesus will be forgiven (Acts 10:43).
This is the gospel of Jesus Christ, the good news that God provided the way for man to be freed from the penalty of sin (John 14:6: Romans 6:23). But not all people will be saved from hell; only those who place their faith in Jesus will go to heaven when they die (Acts 4:12).
The gospel of Jesus Christ is the best news anyone will ever hear, and what a person does with this news will determine where he or she spends eternity. God is calling you to choose life. Call on the name of the Lord and be saved (Romans 10:13)!
Commentary by Got Questions.org