GRFS may be denoted by the use of the Greek word kerygma, meaning proclamation or preaching, referring to the good news (Gospel) concerning salvation to heaven and from a just hell (cf. Rom. 1:16, Gal. 1:6-12, Col. 1:21-23). This Gospel was preached by Peter (in Acts 2:22-24) and summarized by Paul (in 1Cor. 15:1-8). The salient points include: Jesus was a man (1Tim. 1:16), accredited by his sinless life (Heb. 4:15) and ministry (John 10:37-38) to be God’s Messiah, who died on a cross as the sacrifice for humanity’s sins (Rom. 3:25), but who was resurrected from the dead to show his divinity (1Cor. 15:20, Rom. 1:1-4). Messiah is the Way to heaven (John 14:6).
An obvious question to ask at this point is, “What is GRFS for those who have never heard of Jesus?” (which includes everyone living B.C. and millions of people who have lived A.D.) If God loves the world (John 3:16) and wants everyone to be saved (2Tim. 2:3-4, Ezek. 33:11), then He must provide an opportunity. God’s just judgment is illustrated by Jesus in the Parable of the Talents (Matt. 25:14-29), which indicates that God will judge souls on the basis of the truth (Word = Christ per John 1:1f.) they have received.
There are two main ways God/Christ is encountered:
1. General revelation, which includes meditating on the natural world or God’s supernatural work and moral conscience. Paul said men are without excuse, both because God’s eternal power and divine nature (love) are manifested by creation (Rom. 1:20), and because a proto-gospel has been proclaimed to everyone under heaven implicitly or in pre-NT foreshadowings (Acts 14:16-17, 17:26-27&30, Rom. 1:18-20, Rom. 10:13-18, Col. 1:23, Gal. 3:8, 1Pet. 1:10-12, cf. the Parable of the Talents in Matt. 25:14-30). He also taught that all normal humans have an inner conscience or “common” sense (Rom. 2:14-16), which manifests morality or a moral Authority in every culture (the Golden Rule). Thus, sinners have no excuse for not seeking God’s salvation or being truthseekers (Matthew 7:7, Hebrews 11:6).
2. Special revelation (1Pet. 1:8-12), which refers mainly to divinely inspired NT teaching regarding God’s history of salvation. Again, the Parable of the Talents indicates that souls are saved via faith in God/ Christ as revealed (cf. 1Cor. 10:1-5). Truthseekers around the world in all times are pilgrims at various places along the road of life, and all true roads eventually lead to the Way to eternal life in heaven (John 14:6, Acts 24:14, Phil. 2:10-11). All truth leads to One Way.
Regarding the second mode of revelation (NT), the kerygma or GRFS can be stated in various ways, which may cause confusion. Some statements (e.g. Acts 16:31, quoted previously, & Eph. 2:8-9) are in terms of believing right, and others (e.g. Matt. 7:21, “only he who does the will of my Father will enter heaven”, cf. Gal. 6:7-9 & Eph. 2:10) are in terms of behaving right. This prompts the question: Is salvation obtained by believing God’s words or by doing God’s works? The answer is indicated by John 6:29: “The work of God is to believe in the one [Messiah/Christ] He has sent.” As Jesus stated (in John 14:6): “I am the way and the truth and the life. No one comes to the Father except through me.” And saving belief in Christ is connected with or manifested by love for humanity (1John 3:23-24, John 14:15, 23 & 15:9-12).
The mind of Jesus is truth incarnate (John 1:14), and all truth manifests the Spirit of Christ or God (1John 5:6). The work of God (GRFS) is to seek and believe the truth, and part of the truth is that no one comes to know God as Father except through faith in God’s truth embodied as God the Son. And the full Gospel is that salvation is followed by sanctification or spiritual growth toward moral perfection (Phil. 3:12-19) that reflects the love of Christ (Eph. 3:16-19).