We know by the internal evidence that it was definitely written before the Second Temple was destroyed (Revelation 11:1-2).  It was also written before Jerusalem was stoned by the Romans Revelation 16:21 cf. Wars of the Jews 5.6.3:270.  There would be no virtue or point to warn the Christians of Asia Minor about the upcoming Destruction of Jerusalem 25 years after it was a fact.

We must remember that, in context, Jesus said no man knows, not even the Son, during his earthly ministry.  Next, we must realize that God announced the time of Jesus return around A.D.62 or 63 as James 5:1-9 and Revelation 1:1-3 and 7 abundantly attest.  In addition to that what we find in the Prologue of the Book of Revelation, in the Epilogue of Revelation, the Spirit insists, in the strongest possible terms, that the Lord’s coming was then near: Revelation 22:6, 7, 10, 12, and 20.

We believe the coming/ Parousia/ apocalypse of our Lord was an overarching event that lasted from 21 Iyar A.D.63 to the spring of A.D.136.  This means that the Second Coming is an extended rather than momentary event.  In other words, the Lord was actively presiding (επίσκοπος)over the fate of the doomed nation for approximately 70 years and these years make up the Great and Notible Day of the Lord (Acts 2:20).

Everyone in the Land of Israel who had eyes to see witnessed the chariots and troops of soldiers in the clouds before sunset on the Sunday night of 21 Iyyar A.D.63 (Wars of the Jews 6.5.3:296-99).  The vision of the armies in the clouds was the beginning of the event which would lead to the ultimate downfall of the Second Jewish Commonwealth just as a similar event during the persecution of King Antiochus IV Epiphanes forewarned of the downfall of the Seleucids (2 Maccabees 5:1-4).  Because of the heavenly armies that appeared over Jerusalem (in 168 B.C., 231 years before at the time of Antiochus’ second invasion of Egypt).  Now, in A.D.63 the Jews could have easily misinterpreted the meaning of the heavenly armies to be a sign that God would conquer the Romans when, in reality, it was a sign to the Christians that God would defeat the decaying worn-out world of the Law.

^"Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man: but every man is tempted, when he is drawn away of his own lust, and enticed.  Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death." (James 1:13-15 cf. James 4:1-4).

On earth, but beyond the veil: Hebrews 6:19 cf. 10:19-22.  cf. 1 Peter 1:4; 2 Corinthians 5:1-4.

Yes, the Bible describes it as a “second death” and “outer darkness” (Matthew 25:30; Jude 13, and Revelation 21:8).

Millions of Christians enjoy their salvation in the Lord Jesus without this knowledge.  Belief in the deity, death, burial, and resurrection is the core of the Gospel (Galatians 1:6-19 cf. 1 Corinthians 15:1-4).  A complete understanding of this subject or of the whole Bible is not necessary to salvation.  At the same time, God expects his people to teach what is true about everything in his word and, because of this, when we know better we are expected to do better (Luke 12:48).

We do not believe so and the reason why is this:  Testimony after testimony has been published down through the years of people experiencing the new Jerusalem under different emergency circumstances (see, e.g., 90 Minutes in Heaven, and Flight to Heaven).  The lack of prior knowledge that the Lord has fulfilled the New Testament eschaton seems to be irrelevant and not a reason that God, in his grace, would deny a Christian a home with him in glory. 

We must remember that, in context, Jesus said no man knows, not even the Son, during his earthly ministry.  Next, we must realize that God announced the time of Jesus return around A.D.62 or 63 as James 5:1-9 and Revelation 1:1-3 and 7 abundantly attest.  In addition that what we find in the Prologue of the Book of Revelation, in the Epilogue of Revelation the Spirit insists, in the strongest possible terms, that the Lord’s coming was then near: Revelation 22:6, 7, 10, 12, and 20.