Jesus further stressed the certainty of what the signs anticipated with these words. He claimed that His predictions had the same authority and eternal validity as God"s words (cf. Psalm 119:89-90; Isaiah 40:6-8). [source][source][source]
Context Summary
Matthew 24:29-39 - Words That Must Be Fulfilled
The preceding portion of this prophecy is by all interpreters applied to the destruction of Jerusalem. But on the portion that follows there is a considerable division of opinion.
Perhaps it is wisest, between Matthew 24:28-29, to interpolate the Christian centuries during which the gospel is being preached to the Gentiles, according to Romans 11:25, (but that whole chapter should be considered). Just as one who looks across a mountainous country may count the successive ranks of sierras or ranges, but does not record the valleys that lie between, so our Lord, who speaks as the last of the Hebrew prophets, does not stop to notice the story of the Church, but confines Himself to the events which are specially Hebrew.
Probably the present age will be ushered out by scenes not unlike those of the preceding one; and immediately afterward the Lord will set up His reign, and there shall be a new heaven and a new earth. The Advent will be sudden, Matthew 24:36; and will find men unprepared, Matthew 24:38. The Jewish people will exist as a people till then, Matthew 24:34. [source]
Chapter Summary: Matthew 24
1Jesus foretells the destruction of the temple; 3what and how great calamities shall be before it; 29the signs of his coming to judgment 36And because that day and hour are unknown, 42we ought to watch like good servants, expecting our Master's coming
What do the individual words in Matthew 24:35 mean?