The Apostle Paul preached THE LAW of YHVH God the Father is Holy, Just, and Good.
Everywhere Paul went he preached THE LAW.
Paul preached THE LAW every day of his life after repenting of Judaism and humbling himself to YHVH our Father, through His Son.
Romans says Paul FULLY PREACHED THE LAW which is The Gospel of YHVH’s Kingdom and the very LAW YHVH said He would put into His Son in Deuteronomy 18:15-19
THE LAW being obeyed perfectly in God’s Son is what makes and keep Yeshua Messiah as His Son. There is not anything else that qualifies Messiah to be YHVH God the Father’s Son.
We know THE LAW is The Gospel because Hebrews 4:2 declares that THE LAW is The Gospel.
It IS unmistakable that Hebrews declares THE LAW is The Gospel:
Hebrews 3:16-4:2 For who, having heard, rebelled? Indeed, was it not all who came out of Egypt, led by Moses? 17 Now with whom was He angry forty years? Was it not with those who sinned, whose corpses fell in the wilderness?18 And to whom did He swear that they would not enter His rest, but to those who did not obey? 19 So we see that they could not enter in because of unbelief.
4 Therefore, since a promise remains of entering His rest, let us fear lest any of you seem to have come short of it. 2 For indeed the gospel was preached to us as well as to them.
The writer of Hebrews declares anyone who does not keep THE LAW of YHVH our Father WILL NOT enter into His Rest!
This passage in Hebrews also declares that true belief is keeping THE LAW of YHVH God the Father.
Likewise, Hebrews declares anyone who does not keep THE LAW does not truly believe. After all, THE LAW is The Word coming out of the Mouth of YHVH God the Father and obeying Him is the True Faith.
It is perfectly obvious everyone who sins breaking THE LAW will suffer death and not receive eternal life, YHVH’s Rest.
These are probably the most powerful 5 scriptures in all the Bible and declare what true faith and salvation actually are in a very concise history lesson.