Joel prophesies that war and desolation will precede the Second Coming. The sun and the moon will be darkened. “The day of the Lord is great and very terrible.”
1 Blow ye the trumpet in Zion, and sound an alarm in my holy mountain: let all the inhabitants of the land tremble: for the day of the Lord cometh, for it is nigh at hand;
2 A day of darkness and of gloominess, a day of clouds and of thick darkness, as the morning spread upon the mountains: a great people and a strong; there hath not been ever the like, neither shall be any more after it, even to the years of many generations.
3 A fire devoureth before them; and behind them a flame burneth: the land is as the garden of Eden before them, and behind them a desolate wilderness; yea, and nothing shall escape them.
4 The appearance of them is as the appearance of horses; and as horsemen, so shall they run.
5 Like the noise of chariots on the tops of mountains shall they leap, like the noise of a flame of fire that devoureth the stubble, as a strong people set in battle array.
6 Before their face the people shall be much pained: all faces shall gather blackness.
7 They shall run like mighty men; they shall climb the wall like men of war; and they shall march every one on his ways, and they shall not break their ranks:
8 Neither shall one thrust another; they shall walk every one in his path: and when they fall upon the sword, they shall not be wounded.
9 They shall run to and fro in the city; they shall run upon the wall, they shall climb up upon the houses; they shall enter in at the windows like a thief.
10 The earth shall quake before them; the heavens shall tremble: the sun and the moon shall be dark, and the stars shall withdraw their shining:
11 And the Lord shall utter his voice before his army: for his camp is very great: for he is strong that executeth his word: for the day of the Lord is great and very terrible; and who can abide it?
President Joseph Fielding Smith said of the warning given in the preceding verses:
“Here we have a great, terrible army, marching with unbroken ranks and crushing everything before it, finding the garden like Eden before them, leaving the wilderness behind, causing mourning, causing suffering; and so the prophet raises the warning voice, and that voice is to us, if you please, that we might turn unto the Lord and rend our hearts.”
(The Signs of the Times , 160.)