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.

Upon what condition is faith reckoned for righteousness?
Upon what ground were the previous promises then renewed to Abraham?
How are parents instructed to bring up their children?
When used with reference to prophecy, what does the word fulfil mean?
Can there be sin where there is no law?
For what did Christ reprove the Pharisees and Sadducees?
At His ascension, how did the angels say Christ would come again?

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