The Lord Said: "Watch Your Walls Come Tumblin' Down"

Ezekiel 26:1 In the eleventh year, on the first day of the month, the word of the Lord came to me: 2 “Son of man, because Tyre said concerning Jerusalem, ‘Aha, the gate of the peoples is broken; it has swung open to me. I shall be replenished, now that she is laid waste,’ 3 therefore thus says the Lord God: Behold, I am against you, O Tyre, and will bring up many nations against you, as the sea brings up its waves. 4 They shall destroy the walls of Tyre and break down her towers, and I will scrape her soil from her and make her a bare rock.  

At one point, David and the king of Tyre had been very close friends. The cities of Jerusalem and Tyre worked together, as Tyre was an important port city.  But the relationship had turned sour, so when Judah and Jerusalem fell, Tyre rejoiced, seeing it as a plundering opportunity.  The key here is that the gates of Jerusalem were torn down.  Because of their joyfully celebrating Jerusalem's fall, it wouldn't just the gates, but the very walls of Tyre that would be done.  Every empire after walked through Tyre, and eventually the walls of the city were used to build a land bridge out to a nearby island.  Not only the gates, but the walls came tumbling down.  Again, we are warned to not celebrate others' hardships.  Envy always comes back to haunt you.