John Calvin on Joel 2:4

He afterwards adds many similitudes, which any one of himself can sufficiently understand: I shall not therefore be long in explaining them, and many words would be superfluous. As the appearance of horses their appearance, and as horsemen, so will they run. This verse sets forth again the suddenness of vengeance, as though the Prophet had said, that long distance would be no obstacle, for the Assyrians would quickly move and occupy Judea; for distance deceived the Jews, and they thought that there would be a long respite to them. Hence the Prophet here removes this vain confidence, when he says that they would be like horses and horsemen. He then adds, —