Gospel
The Gospel is the good news that we have forgiveness of sins through Jesus. Specifically, the gospel is defined by Paul in 1 Cor. 15:1-4: "Now I make known to you, brethren, the gospel which I preached to you, which also you received, in which also you stand, by which also you are saved, if you hold fast the word which I preached to you, unless you believed in vain. For I delivered to you as of first importance what I also received, that Christ died for our sins according to the Scriptures, and that He was buried, and that He was raised on the third day according to the Scriptures."
The gospel comes from God (Gal. 1:10-12), is the power of God for salvation (Rom. 1:16), is a mystery (Eph. 6:19), and is a source of hope (Col. 1:23), faith (Acts 15:7), life (1 Cor. 4:15), and peace (Eph. 6:15).