When a man makes a noise from a precipice, it sounds again and again off the mountains, until it can be heard no more and is quickly forgotten. God's ways are the opposite. The echoes come before the event. The truthfulness and power of God's Word is manifested over and over, and in increasing volume, until the ultimate promise is fulfilled. Ezekiel was telling of imminent judgment for sin, they had heard the last echo. "An end is come, the end is come: it watcheth for thee; behold, it is come" (Ezekiel 7:6).
The wrath of God is often preceded by lesser sorrows, sent before to convince people that He is serious about His warnings. We read of this in the Prophet Isaiah's day. Captivity and loss of nation loomed in the future as the specific and ultimate judgment for sin (as Moses had earlier promised Israel). But, before that, God had brought many lesser judgments upon Israel. "Why should ye be stricken any more? ye will revolt more and more: the whole head is sick, and the whole heart faint" (Isaiah 1:5). They had ignored the echoes.
Consider also the situation in the world today. Prophecy tells us of apocalyptic judgments that will befall the earth for the heavy weight of sin upon it. The scale and magnitude of the sorrows of that day are horrific, and they once seemed unimaginable. But the echoes of such trouble are increasing all the time to a global scale in the economy, the environment (oil pollution), and in international tensions concerning the Middle East. The ever increasing likeness between the newspaper and the words of the Prophets point to the soon return of Christ. The echoes are getting deafening.
Yet, as the warnings of God echo about, there is still another message in the mountains too. "How beautiful upon the mountains are the feet of him that bringeth good tidings, that publisheth peace; that bringeth good tidings of good, that publisheth salvation" (Isaiah 52:7). There is still time to repent of sin and receive salvation through faith in Jesus Christ, who loved us enough to die in payment for our sins, and who also rose again.