I see. Let me try to clarify.
1. When we read the bible it was written too and about people living in what the bible called "
This Age". In other words, the Age of Moses or the Age of the law.
2. The prophets in the OT looked forward to and prophesied about a "
Age to come"
3. Jesus shows up on the scene and he begins talking about the "
kingdom of God" . It is no Jewish secret, the Kingdom of God was a part of the Jewish kingdom which would come when messiah came to set up his rule and reign /kingdom in the "
Age to come".
4. Jesus is crucified, buried and raised from the dead to show that he was the messiah and his death and resurrection would provide freedom for the captives that had previously died "
in this Age /
Law of Moses Age" . Jesus empties out hades were those souls of the dead had been kept.
5. Jesus returns to the Father but has promised to his disciples that he would return (second appearing, second coming) within their lifetime.
6. The Apostles then go around preaching about "
the age to come / Kingdom of God / Eternal life / Resurrection / Righteousness / Justification on on and on " which would occur at the destruction of Jerusalem and the temple in 70AD.
Read Matthew 24:1-3 Very Closely
7. The period between the ages (
this age and the age to come ) is often referred to as the transition period from Old covenant to New covenant. You can see the transition period plainly if you read the new testament. They were transitioning from Moses to Christ, from old covenant to new covenant, from old wine skin to new wine skins ect ect ect. We see this in 2 Peter 1:19 "
So we have the prophetic word made more sure, to which you do well to pay attention as to a lamp shining in a dark place, until the day dawns and the morning star arises in your hearts. You can see they were patiently waiting "until the day dawns" and the "morning star rises in your hearts "
8. We read in Galations chapter 5 vs. 5 :
5 For through the Spirit we eagerly await by faith the righteousness for which we hope. Those in the transition period from Old Covenant to New Covenant were still waiting by faith for "righteousness" . If Christ accomplished it at the cross, why are they still waiting on it ?
9. If you know the new testament...................you know why Christ second appearing / second coming was to tear down the old and usher in new covenant life in him.