John Wesley answers the question “What is the gospel?” in his sermon “The Way to the Kingdom.”
The gospel, (that is, good tidings, good news for guilty, helpless sinners,) in the largest sense of the word, means, the whole revelation made to men by Jesus Christ; and sometimes the whole account of what our Lord did and suffered while he tabernacled among men. The substance of all is, “Jesus Christ came into the world to save sinners;” or, “God so loved the world that he gave his only-begotten Son, to the end we might not perish, but have everlasting life;” or, “He was bruised for our transgressions, he was wounded for our iniquities; the chastisement of our peace was upon him; and with his stripes we are healed.”
We can see a little of the Wesleyan both/and here. He acknowledges that the gospel includes the entire account of Jesus’ incarnation and ministry. Fans of N.T. Wright can cheer this. But he also identifies the “substance,” a word that in philosophy and theology means the essential nature of the thing. That essential heart of the gospel is the saving and atoning work of Jesus.