For what purpose is the mystery of the gospel made manifest?

Answer

But now [the mystery] is made manifest, and by the Scriptures of the prophets, according to the
commandment of the everlasting God, made known to all nations for the obedience of faith." Rom. 16: 26.

How is the fulfilment of this prophecy recorded?
Did Joshua think it immaterial what god Israel served?
What did Jesus say of His attitude toward the law?
How long was Jerusalem to be trodden down of the Gentiles?
How great reward has God promised those that love Him?
How did man lose his dominion?
How long will they possess the future kingdom?

Questions & Answers are from the book Bible Readings for the Home Circle