The word “gospel” means “good news” and was used for royal proclamations or announcements in biblical times; Jesus used this term to describe His teaching about the coming of the kingdom of God. It is also used to title the four accounts of His life, death, and resurrection – The Gospel according to Matthew, Mark, Luke, and John.
OT: Moses gives Torah (the Law); NT: Jesus gives the Gospel.
- Acts 5:20 “Go, stand and speak to the people in the temple the whole message of this Life.”
- Eph 1:13 …you also, after listening to the message of truth, the gospel of your salvation–having also believed…
Verses indicating, whether explicitly or implicitly, that response to the gospel is a matter of obedience: John 3:36; Acts 6:7; Rom 1:5; 2:8; 16:25-27; 2 Thess 1:8; 1 Pet 4:17
The Duty of a Man 