Begin with the conversation
Jesus made this statement while answering His disciples’ questions on the Mount of Olives. They had admired the temple, but Jesus foretold its complete destruction. Then they asked when these things would happen and what sign would mark His coming and the end of the world (Matthew 24:1-3).
That setting explains why the verse is debated. The disciples’ questions bring together the temple, Jerusalem’s future, Christ’s coming, and the end. Jesus’ answer addresses real danger that was approaching, while also calling His people to look beyond it with hope.
Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
The Jerusalem reading
The most common reading takes “this generation” in its usual sense, the people alive when Jesus spoke. The Greek word genea means a generation or people living in the same time. Elsewhere, Jesus used it of the people responding to His ministry, which supports this straightforward meaning (Matthew 11:16).
On this view, “all these things” means the signs and judgement Jesus had just described concerning Judaea and Jerusalem. He told those in Judaea to flee when they saw the crisis coming (Matthew 24:15-18). Luke records Jesus speaking plainly of Jerusalem surrounded by armies, severe suffering in the city, and its devastation (Luke 21:20-24).
Jerusalem and its temple were destroyed by the Romans in AD 70, within the lifetime of many who heard Jesus. For readers who hold this view, that event shows that Jesus’ warning was neither vague nor mistaken.
Verily I say unto you, This generation shall not pass away, till all be fulfilled.
Why some see a further horizon
Matthew 24 also describes darkened heavenly lights and the Son of man coming with power and great glory (Matthew 24:29-31). Because those words sound larger than Jerusalem alone, some Christians believe Jesus’ teaching moves from the first-century destruction to His final, visible return.
They understand “this generation” as the generation alive when the final signs begin. Others understand the whole section as first-century judgement language, drawing on the vivid imagery used by Old Testament prophets. A third view sees both, a near fulfilment in Jerusalem and a later fulfilment when Christ returns.
Christians who love Scripture have held each of these views. The passage gives good reasons to study carefully, but it does not invite us to speak with more certainty than Jesus does.
What Jesus wants us to do
Jesus anchors the difficult details in the reliability of His own words. He says that heaven and earth will pass away, but what He says will not fail (Matthew 24:35). His warning about Jerusalem was fulfilled, and His promise to return remains sure.
At the same time, Jesus says that no one knows the precise day or hour (Matthew 24:36). So the point is not to produce end-times calendars. It is to stay awake, trust Him, and live faithfully in the ordinary responsibilities of today (Matthew 24:42).
Heaven and earth shall pass away, but my words shall not pass away.