We also see posts that say the Mystery only came via Paul and that all that was before Paul concerning the Gentiles isn't for Gentiles today. That isn't what the Bible says. The Mystery of salvation unfolded toward the Gentiles before Paul was ever converted. It was Peter who understood the mystery in Acts 10:13-15
13 And there came a voice to him, Rise , Peter; kill , and eat.
14 But Peter said , Not so, Lord; for I have never eaten any thing that is common or unclean.
15 And the voice spake unto him again the second time, What God hath cleansed, that call not thou common.
Acts 11:1-7
1 And the apostles and brethren that were in Judaea heard that the Gentiles had also received the word of God.
2 And when Peter was come up to Jerusalem, they that were of the circumcision contended with him,
3 Saying , Thou wentest in to men uncircumcised , and didst eat with them.
4 But Peter rehearsed the matter from the beginning, and expounded it by order unto them, saying ,
5 I was in the city of Joppa praying: and in a trance I saw a vision, A certain vessel descend , as it had been a great sheet, let down from heaven by four corners; and it came even to me:
6 Upon the which when I had fastened mine eyes, I considered, and saw four footed beasts of the earth, and wild beasts, and creeping things, and fowls of the air.
7 And I heard a voice saying unto me, Arise, Peter; slay and eat.
Acts 11:18 18 When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
Romans 1:16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
13 And there came a voice to him, Rise , Peter; kill , and eat.
14 But Peter said , Not so, Lord; for I have never eaten any thing that is common or unclean.
15 And the voice spake unto him again the second time, What God hath cleansed, that call not thou common.
Acts 11:1-7
1 And the apostles and brethren that were in Judaea heard that the Gentiles had also received the word of God.
2 And when Peter was come up to Jerusalem, they that were of the circumcision contended with him,
3 Saying , Thou wentest in to men uncircumcised , and didst eat with them.
4 But Peter rehearsed the matter from the beginning, and expounded it by order unto them, saying ,
5 I was in the city of Joppa praying: and in a trance I saw a vision, A certain vessel descend , as it had been a great sheet, let down from heaven by four corners; and it came even to me:
6 Upon the which when I had fastened mine eyes, I considered, and saw four footed beasts of the earth, and wild beasts, and creeping things, and fowls of the air.
7 And I heard a voice saying unto me, Arise, Peter; slay and eat.
Acts 11:18 18 When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
Romans 1:16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
1 Peter 1:11,12 Searching what, or what manner of time the Spirit of Christ which was in them did signify, when it testified before hand the sufferings of Christ and the glory that should follow. Unto whom [the OT prophets] it was revealed, that no unto themselves, but unto us they did minister the things which are now reported unto you by them [th Church apostles and prophets in Eph. 4:11] that have preached the gospel unto you with the Holy Spirit sent down from heaven; which things the angels desire to look into.
What did the OT prophets search for? The period of time between the sufferings of Christ and the glory that should follow. This period of time is THE MYSTERY, which was "hid in God" [Eph. 3:9] "hid from ages and from generations [Col. 1:26]; kept secret since the world began," [Rom. 16:25]; never made known "in other ages." [Eph. 3:5] Not a single word was written of THIS GREAT MYSTERY until it was revealed in detail to Paul. - If ye have heard of the dispensation [administration] of the grace of God which is given me to you-ward: How that by revelation he made known unto me the mystery; (as I wrote afore in few words, Whereby when you read, you may understand my knowledge in the mystery of Christ (Eph. 3:2-4) But I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ [Gal. 1:11,12] If Paul had learned this from the OT or the gospels or tradition - he would have learned it of man or been taught it - but he received it by revelation of Jesus Christ. If God hid something, believe me He hid it and kept it hid until the time appointed and it was revealed until the apostle Paul it by revelation of Jesus Christ.
As we can see on this thread, the following 2 verses are rejected because some refuse to admit that God's judgment is the same "to the Jew first and also to the Gentile." If they admitted this to be true in its simplicity, they would also have to admit that the definitions of love detailed in the law are still valid for the Gentiles. They would also have to admit that punishments and curses for willful disobedience applied to the Gentiles the same as the Jews/Israel in the Old Testament. They would also have to admit that blessings for willful obedience applied to the Gentiles as well as the Jews/Israel in the Old Testament.
Romans 2:9-10
9 Tribulation and anguish, upon every soul of man that doeth evil, of the Jew first, and also of the Gentile;
10 But glory, honour, and peace, to every man that worketh good, to the Jew first, and also to the Gentile:
So many today want to claim salvation without any responsibilty of obedience toward God, and then claim obedience by rejecting the instructions given to the Jew first.
Romans 2:9-10
9 Tribulation and anguish, upon every soul of man that doeth evil, of the Jew first, and also of the Gentile;
10 But glory, honour, and peace, to every man that worketh good, to the Jew first, and also to the Gentile:
So many today want to claim salvation without any responsibilty of obedience toward God, and then claim obedience by rejecting the instructions given to the Jew first.