Mat 15:8 This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me.
Isaiah 60:1 Arise, shine; for thy light is come, and the glory of the LORD is risen upon thee. 60:2 For, behold, the darkness shall cover the earth, and gross darkness the people: but the LORD shall arise upon thee, and his glory shall be seen upon thee. 60:3 And the Gentiles shall come to thy light, and kings to the brightness of thy rising.
Luke 2:25 And, behold, there was a man in Jerusalem, whose name was Simeon; and the same man was just and devout, waiting for the consolation of Israel: and the Holy Ghost was upon him. 2:26 And it was revealed unto him by the Holy Ghost, that he should not see death, before he had seen the Lord's Christ. 2:27 And he came by the Spirit into the temple: and when the parents brought in the child Jesus, to do for him after the custom of the law, 2:28 Then took he him up in his arms, and blessed God, and said, 2:29 Lord, now lettest thou thy servant depart in peace, according to thy word: 2:30 For mine eyes have seen thy salvation, 2:31 Which thou hast prepared before the face of all people; 2:32 A light to lighten the Gentiles, and the glory of thy people Israel. 2:33 And Joseph and his mother marvelled at those things which were spoken of him. 2:34 And Simeon blessed them, and said unto Mary his mother, Behold, this child is set for the fall and rising again of many in Israel; and for a sign which shall be spoken against; 2:35 (Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed.
Daniel 9:26 And after threescore and two weeks shall Messiah be cut off, but not for himself: and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined.
Romans 11:11 I say then, Have they stumbled that they should fall? God forbid: but rather through their fall salvation is come unto the Gentiles, for to provoke them to jealousy. 11:12 Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness?
Romans 11:23 And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.
Romans 11:25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in. 11:26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob: 11:27 For this is my covenant unto them, when I shall take away their sins. 11:28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes.
So what is this turning of ungodliness FROM JACOB?
Isaiah 60:1 Arise, shine; for thy light is come, and the glory of the LORD is risen upon thee.
When is it? At the Lord's return "unto them" after that time OF JACOB's Trouble...
Isaiah 60:2 For, behold, the darkness shall cover the earth, and gross darkness the people: but the LORD shall arise upon thee, and his glory shall be seen upon thee. 60:3 And the Gentiles shall come to thy light, and kings to the brightness of thy rising.
Romans 9-11 is relating the issue of what became of Israel UNTIL THEN, that the salvation of God among the Gentiles that had been prophesied would follow Israel's rise first, has ended up going not only directly to the Gentiles; but through Israel's prophesied temporary fall first, instead.
In this, Romans 11:25 is relating a mystery; enigma; or seeming perplexity - that God is visiting Gentiles directly during this time of Israel's temporary fall.
For this visit among the Gentiles during Israel's temporary fall; though in agreement with the fact of Israel's Prophesied temporay fall, while in no way in violation of His Covenant unto Israel; had nevertheless, not been prophesied. Thus, its enigma.
In this, passages like that one in Matthew 15:8 , and Acts 1-7, are the faith that Romans 10 is referring to and that unbelieving Israel failed to hear.
The principle of faith is ever the same throughout each successive dispensation or stewardship; but the content differs in each, because the content continues to unfold, and as a result; differ in each.
John 1:17 For the law was given by Moses, but grace and truth came by Jesus Christ.
Luke 12:42 And the Lord said, Who then is that faithful and wise steward, whom his lord shall make ruler over his household, to give them their portion of meat in due season?