The last great book of the Bible opens with the words: “The revelation of Jesus Christ,” and from these words it derives its title: “The Revelation.” In this book St. John deals largely with the return of Christ in glory to judge and reign.
II Thes. 1:7,8 tells us that one day “the Lord Jesus shall be revealed from heaven… in flaming fire taking vengeance on them that… obey not the gospel of our Lord Jesus Christ.” This is what the book of the Revelation is basically about. But this phraseology is also used in Paul’s epistles, for in Gal. 1:11,12 he says:
“I certify you, brethren, that the gospel which was preached by me is not after man, for I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ.”
Surely this is not the same “revelation of Jesus Christ” of which John wrote. St. Paul refers not to “the revelation of Jesus Christ” in glory, but to “the revelation of Jesus Christ” in grace while He delays the judgment; not His revelation to the world in person, but His revelation to the world through Paul the chief of sinners, saved by grace. In Verses 15,16 of Gal. 1, the Apostle says: “…it pleased God… to reveal His Son in Me.” What a revelation of grace to a sin-cursed world when God saved Saul, His bitter, blaspheming enemy! He tells about it in I Tim. 1:13-16, where he says:
“[I] was a blasphemer, and a persecutor, and injurious… Howbeit, FOR THIS CAUSE I OBTAINED MERCY, THAT IN ME FIRST JESUS CHRIST MIGHT SHOW FORTH ALL LONGSUFFERING, FOR A PATTERN TO THEM WHICH SHOULD HEREAFTER BELIEVE ON HIM TO LIFE EVERLASTING.”
This is why Paul says: “…it pleased God… to reveal His Son in Me.” By saving the chief of sinners (as Paul calls himself in I Tim. 1:15), God would show us that He is willing to save any sinner, “for whosoever shall call upon the name of the Lord shall be saved” (Rom. 10:13). source