[Jesus] said to them, ‘Thus it is written, that the Christ should suffer and on the third day rise from the dead, and that repentance and forgiveness of sins should be proclaimed in His name to all nations, beginning from Jerusalem.’ (Luke 24:46–7)
These words are spoken near the very end of Luke’s Gospel of the Gospel message, yet when many Christians speak of the Gospel it doesn’t mound such like Jesus’ words. Often the Gospel of love is referenced, though those words are never used in Scripture, but rather that God is a loving God whose general love was displayed in the sending of His Son and who pours out His special love to those redeemed through faith in His name; in fact His love being an encouragement to seek Him with the promise that He by no means casts away those who come to Him (Jn 6:37b).
You also often here ‘Gospel’ phrases like, ‘Jesus died for everyone, all you have to do is believe’; or ‘on the cross Jesus paid for the sin of the whole world, do you believe this?,’ or, ‘Jesus loves you and died for you, all you need to do is receive His love’; etc, etc, etc. Yet if He died for all than He His blood cannot be all sufficient, or He must not be all powerful, for He doesn’t follow through and save all those ‘He’s died for.’
I used to speak this way, but I’ve learned to be more discerning with my words because words matter. Words express truth and lead people to a fuller or lesser knowledge of the truth. What Jesus says at the end of Luke’s Gospel is the Gospel. It is a message to repent and ask Christ, on the basis of his work on the Cross, to forgiven your sins, the love of God being an encouragement to believe (vs. Him being an angry or vindictive god). We would more rightly speak of Jesus dying so that all who believe (i.e. the elect) on His name might be saved through repentance and faith (Jn 1:12).
What Christians often confuse here, sometimes through a simple lack of discernment caused by want of discipleship or sometimes a result of misguided teaching, is the universal call of the Gospel message and the limited nature of the atonement.
The Gospel invitation is open to all, it is universal, to be proclaimed to all nations. Countless Bible verses express this such as, “anyone who calls upon the name of the Lord shall be saved.” (Acts 2:21) Thus, anyone might be saved if they approach Christ in faith. What a gracious message to undeserving sinners!
Yet, the Bible is also very specific that Jesus death on the cross was specific, particular, limited, especially for those the Father had given Him (Jn 6:37a). Jesus died to save His own! (c.f. Jn 10:3). Ephesians 1 says that he chose to redeem from sin this unworthy elect group “to the praise of His glory,” mentioned three times to emphasis salvations focus is God.
The universal Gospel call is glorious, still more the specific love of God shown to His elect people through faith in Jesus Christ (Ro 8:28–39, the favourite v.28 is often cherry picked out of its wider context). God didn’t have to save anyone, that He chose to do so is utter grace.
So, as Christians, let’s not wix up our mords about the Gospel, it’s far too precious for that. Let’s know it, share it clearly and do so with conviction, just as Jesus at the end of Luke’s Gospel commands us.
The Lord’s Sweetest Blessings,
 Jesus’ Death and Resurrection not only accomplished salvation but they also testify that He is God’s Son and can be trusted. Belief in these historic events is a prerequisite, or bound up in, believing the Gospel.