Luke 17:22

And he said unto the disciples, The days will come, when ye shall desire to see one of the days of the Son of man, and ye shall not see it.

This verse is a reference to the present dispensation, during which Christians, oppressed by temptations and tribulations, will, like the Pharisees of old, desire to see just such cataclysmic events as they wanted to see, and which they erroneously understood would usher in the kingdom of heaven. Jesus shows here that those great physical, cataclysmic disorders and cosmic signs shall indeed come to pass (at the Second Coming,) but not now. Like the martyred saints, Christians who find themselves a conscious, hated minority in society, reviled, and set at naught by a hostile secular world, will cry, "How long?" (Revelation 6:10); but the end is not yet.