:think:
“Also the sons of the foreigner Who join themselves to the Lord, to serve Him, And to love the name of the Lord , to be His servants— Everyone who keeps from defiling the Sabbath, And holds fast My covenant—Even them I will bring to My holy mountain, And make them joyful in My house of prayer. Their burnt offerings and their sacrifices Will be accepted on My altar; For My house shall be called a house of prayer for all nations.”The Lord God, who gathers the outcasts of Israel, says, “Yet I will gather to him Others besides those who are gathered to him.” - Isaiah 56:6-8
http://www.biblegateway.com/passage/?search=Isaiah56:6-8&version=NKJV
Nope, that's talking about Gentiles who become Jews, who take part in the covenant God established with Israel.
:think:
For this reason I, Paul, the prisoner of Christ Jesus for you Gentiles—if indeed you have heard of the dispensation of the grace of God which was given to me for you,how that by revelation He made known to me the mystery (as I have briefly written already,by which, when you read, you may understand my knowledge in the mystery of Christ),which in other ages was not made known to the sons of men, as it has now been revealed by the Spirit to His holy apostles and prophets:that the Gentiles should be fellow heirs, of the same body, and partakers of His promise in Christ through the gospel,of which I became a minister according to the gift of the grace of God given to me by the effective working of His power. - Ephesians 3:1-7
http://www.biblegateway.com/passage/?search=Ephesians3:1-7&version=NKJV
Nope. Completely different.
The nation of Israel is not a body, never described as a body, and was never given a dispensation of Grace, but instead, Law, and the dispensation of grace was not revealed to Israel, but kept a mystery from the creation of the world to Paul, as Paul says, "which in other ages was not made known to the sons of men, as it has now been revealed by the Spirit to His holy apostles and prophets..."
How soon after? and how far did it go? Which books do you learn this from?
Rather, it's simply, to use an analogy, saying that those who purchased bus tickets got on the bus.
It wasn't predetermined (and I use that term loosely) beforehand who would purchase tickets.