Another good one from the GotQuestions? site.
Question: “What is the gospel?”
Answer: The word gospel literally means “good news” and occurs 93 times in the Bible, exclusively in the New Testament. In Greek, it is the word euaggelion, from which we get our English words evangelist, evangel, and evangelical. The gospel is, broadly speaking, the whole of Scripture; more narrowly, the gospel is the good news concerning Christ and the way of salvation.
The key to understanding the gospel is to know why it’s good news. To do that, we must start with the bad news. The Old Testament Law was given to Israel during the time of Moses (Deuteronomy 5:1). The Law can be thought of as a measuring stick, and sin is anything that falls short of “perfect” according to that standard. The righteous requirement of the Law is so stringent that no human being could possibly follow it perfectly, in letter or in spirit. Despite our “goodness” or “badness” relative to each other, we are all in the same spiritual boat—we have sinned, and the punishment for sin is death, i.e. separation from God, the source of life (Romans 3:23). In order for us to go to heaven, God’s dwelling place and the realm of life and light, sin must be somehow removed or paid for. The Law established the fact that cleansing from sin can only happen through the bloody sacrifice of an innocent life (Hebrews 9:22).
The gospel involves Jesus’ death on the cross as the sin offering to fulfill the Law’s righteous requirement (Romans 8:3–4; Hebrews 10:5–10). Under the Law, animal sacrifices were offered year after year as a reminder of sin and a symbol of the coming sacrifice of Christ (Hebrews 10:3–4). When Christ offered Himself at Calvary, that symbol became a reality for all who would believe (Hebrews 10:11–18). The work of atonement is finished now, and that’s good news.
The gospel also involves Jesus’ resurrection on the third day. “He was delivered over to death for our sins and was raised to life for our justification” (Romans 4:25). The fact that Jesus conquered sin and death (sin’s penalty) is good news, indeed. The fact that He offers to share that victory with us is the greatest news of all (John 14:19).