Only fear the Lord - Know, respect, and reverence him.

Serve him - Consider him your Lord and Master; consider yourselves his servants.

In truth - Be ever honest, ever sincere; with all your heart - have every affection engaged in the work of obedience; act not merely from a principle of duty, but also from a pious, affectionate sense of obligation. Act towards your God as an affectionate child should act towards a tender and loving parent.

Consider how great things - Review the history of your fathers, review your own life; see what interpositions of power, mercy, goodness, and truth, God has displayed in your behalf! Has he not daily loaded you with his benefits?

Only fear the Lord, and serve him in truth with all your heart,.... Fear him not with a servile fear, which is before dehorted from, but with a filial fear, a reverential affection for God; and includes the whole of religious worship, internal and external; explained further by serving him according to the truth of his word, and in a cordial, sincere, and affectionate manner; and if this was wanting in them, he suggests that his prayers and instructions would be of little avail, and not to be depended on:

for consider how great things he hath done for you; in bringing them out of Egypt: settling them in the land of Canaan; giving them his laws, statutes, commands, and ordinances; sending prophets unto them, and raising up judges for them, and bestowing all good things on them, in nature, providence, and grace; though some restrain this to the great thing he had done that day, to convince them of their sin, and by which they were returned to the Lord, namely, the violent storm of thunder; which wonderful instance of the power of God, and token of his displeasure against them, they were to lay up in their minds, and not forget, that it might be a means of preserving them from sin for the future.

Lastly, he repeats once more his admonition, that they would continue stedfast in the fear of God, threatening at the same time the destruction of both king and people if they should do wrong (on 1 Samuel 12:24, see 1 Samuel 7:3 and Joshua 24:14, where the form יראוּ is also found). "For see what great things He has done for you" (shown to you), not by causing it to thunder and rain at Samuel's prayer, but by giving them a king. עם הגדּיל, as in Genesis 19:19.

Only fear the LORD, and serve him in truth with all your {o} heart: for consider how great things he hath done for you.

(o) Unfeignedly, and without hypocrisy.

12:24 Only, and c. - Otherwise neither my prayer nor counsels will stand you in any stead.

how...: or, what a great thing

Margin fear

See Scofield Note: "Ps 19:9".

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.