This great thing - This unusual occurrence.

Now therefore stand,.... Which does not so much respect the position of their bodies as the fixed attention of their minds:

and see this great thing which the Lord will do before your eyes; meaning the storm of thunder and rain which presently followed; which coming at a time when such things were not usual, and on a day when there was no appearance or likelihood of anything of this kind, and suddenly, at once, upon the prayer of Samuel, it was no less than a miracle, and might be called a "great thing", new and unheard of, and the pure effect of almighty power.

In order to give still greater emphasis to his words, and to secure their lasting, salutary effect upon the people, Samuel added still further: Even now ye may see that ye have acted very wickedly in the sight of Jehovah, in demanding a king. This chain of thought is very clearly indicated by the words גּם־עתּה, "yea, even now." "Even now come hither, and see this great thing which Jehovah does before your eyes." The words גּם־עתּה, which are placed first, belong, so far as the sense is concerned, to את־הד ראוּ; and התיצּבוּ ("place yourselves," i.e., make yourselves ready) is merely inserted between, to fix the attention of the people more closely upon the following miracle, as an event of great importance, and one which they ought to lay to heart. "Is it not now wheat harvest? I will call to Jehovah, that He may give thunder (קלוה, as in Exodus 9:23, etc.) and rain. Then perceive and see, that the evil is great which ye have done in the eyes of Jehovah, to demand a king." The wheat harvest occurs in Palestine between the middle of May and the middle of June (see by Bibl. Arch. i. 118). And during this time it scarcely ever rains. Thus Jerome affirms (ad Am. c. 4): "Nunquam in fine mensis Junii aut in Julio in his provinciis maximeque in Judaea pluvias vidimus." And Robinson also says in his Palestine (ii. p. 98): "In ordinary seasons, from the cessation of the showers in spring until their commencement in October and November, rain never falls, and the sky is usually serene" (see my Arch. i. 10). So that when God sent thunder and rain on that day in answer to Samuel's appeal to him, this was a miracle of divine omnipotence, intended to show to the people that the judgments of God might fall upon the sinners at any time. Thunderings, as "the voice of God" (Exodus 9:28), are harbingers of judgment.

Now therefore stand and see this great thing, which the LORD will do before your eyes.

12:16-25 At Samuel's word, God sent thunder and rain, at a season of the year when, in that country, the like was not seen. This was to convince them they had done wickedly in asking a king; not only by its coming at an unusual time, in wheat harvest, and on a clear day, but by the prophet's giving notice of it before. He showed their folly in desiring a king to save them, rather than God, or Samuel; promising themselves more from an arm of flesh, than from the arm of God, or from the power of prayer. Could their prince command such forces as the prophet could do by his prayers? It startled them very much. Some will not be brought to see their sins by any gentler methods than storms and thunders. They entreat Samuel to pray for them. Now they see their need of him whom shortly before they slighted. Thus many who will not have Christ to reign over them, would yet be glad to have him intercede for them, to turn away the wrath of God. Samuel aims to confirm the people in their religion. Whatever we make a god of, we shall find it deceive us. Creatures in their own places are good; but when put in God's place, they are vain things. We sin if we restrain prayer, and in particular if we cease praying for the church. They only asked him to pray for them; but he promises to do more, to teach them. He urges that they were bound in gratitude to serve God, considering what great things he had done for them; and that they were bound in interest to serve him, considering what he would do against them, if they should still do wickedly. Thus, as a faithful watchman, he gave them warning, and so delivered his own soul. If we consider what great things the Lord hath done for us, especially in the great work of redemption, we can neither want motive, encouragement, nor assistance in serving him.