What two covenants are contrasted in the Bible?

Answer

"In that He says, A new covenant, He hath made the first old. Now that which decays and waxes old is
ready to vanish away." Heb. 8: 13.

Upon what basis does the reward come to one who works?
What is the great secret of a happy home?
To whom does God reveal the secrets of the future?
How early was this sacrificial system known?
What was to follow the great earthquake?
How long will they live?
What will be the difference between the portion of the righteous and the wicked?

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