Through Isaiah, Jehovah says that not only will the siege of Jerusalem fail but “within just sixty-five years Ephraim will be shattered to pieces so as not to be a people.” (Isaiah 7:8) Yes, within 65 years Israel will no longer exist as a people.a This assurance, with its specific timetable, should give Ahaz courage. In the same way, God’s people today are strengthened by knowing that the time left for Satan’s world is running out.