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.

In what prophecy was the work of reconciliation foretold?
What was the effect of this apostasy?
Where was the law of God written under the old covenant?
20. When and by what church council was the observance of the seventh day forbidden, and Sunday observance enjoined ?
What did the prophet see coming up at this time?
What will He say to those on His right hand?
Upon what one fact does Paul base the Christian hope?

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