O Jehovah! of thy good pleasure. This verse describes the difference which exists between the confidence which is founded upon the word of God and the carnal security which springs from presumption. True believers, when they rely upon God, are not on that account neglectful of prayer. On the contrary, looking carefully at the multitude of dangers by which they are beset, and the manifold instances of human frailty which pass before their eyes, they take warning from them, and pour out their hearts before God. The prophet now failed in duty as to this matter; because, by anchoring himself on his present wealth and tranquillity, or spreading his sails to the prosperous winds, he depended not on the free favor of God in such a manner as to be ready at any time to resign into his hands the blessings which he had bestowed upon him. The contrast should be observed between that confidence of stability which arises from the absence of trouble, and that which rests upon the gracious favor of God. When David says that strength was established to his mountain, some interpreters expound it of mount Zion. Others understand by it a stronghold or fortified tower, because in old time fortresses were usually built upon mountains and lofty places. I understand the word metaphorically to signify a solid support, and therefore readily admit that the prophet alludes to mount Zion. David thus blames his own folly, because he considered not, as he ought to have done, that there was no stability in the nest which he had formed for himself, but in God's good will alone. Thou hast hidden thy face. Here he confesses, that, after he was deprived of God's gifts, this served to purge his mind as it were by medicine from the disease of perverse confidence. A marvellous and incredible method surely, that God, by hiding his face, and as it were bringing on darkness, should open the eyes of his servant, who saw nothing in the broad light of prosperity. But thus it is necessary that we be violently shaken, in order to drive away the delusions which both stifle our faith and hinder our prayers, and which absolutely stupify us with a soothing infatuation. And if David had need of such a remedy, let us not presume that we are endued with so good a state of heart as to render it unprofitable for us to be in want, in order to remove from us this carnal confidence, which is as it were diseased repletion which would otherwise suffocate us. We have, therefore, no reason to wonder, though God often hides his face from us, when the sight of it, even when it shines serenely upon us, makes us so wretchedly blind.

Lord, by thy favor thou hast made my mountain to stand strong - Margin: "settled strength for my mountain." This refers, I apprehend, to his former state of mind; to his confidence in that which constituted his prosperity as referred to in the previous verse; to his feeling, in that state, that everything pertaining to himself was safe; to his freedom from any apprehension that there would be any change. The word "mountain" seems to be used as denoting that on which he relied as his security or strength, as the mountain, or the inaccessible hills, constituted a refuge and security in times of danger. See Psalm 18:1-2, Psalm 18:33; Psalm 27:5. It does not refer to Mount Moriah, or Mount Zion, as some have supposed, for the passage relates to a former period of his life when these were not in his possession; but he speaks of himself as having, through the favor of God, put himself into a strong position - a position where he feared no enemy and no change; where he thought himself entirely secure - the state of "prosperity" to which he had referred in the previous verse. In that state, however, God showed him that there was no real security but in his favor: security not in what a man can draw around himself, but in the favor of God alone.
Thou didst hide thy face - That is, at the time when I was so confident, and when I thought my mountain stood so strong, and that I was so secure. Then I was shown how insecure and uncertain was all that I relied on, and how absolutely, after all that I had done, I was dependent for safety on God. To "hide the face" is synonymous in the sacred writings with the withdrawing of favor, or with displeasure. See the notes at Psalm 13:1. Compare Psalm 104:29.
And I was troubled - I was confounded, perplexed, agitated, terrified. I was thrown into sudden fear, for all that I had so confidently relied on, all that I thought was so firm, was suddenly swept away. We do not know what this was in the case of the psalmist. It may have been the strength of his own fortifications; it may have been the number and discipline of his army; it may have been his own conscious power and skill as a warrior; it may have been his wealth; it may have been his bodily health - in reference to any of which he may have felt as if none of these things could fail. When that on which he so confidently relied was swept away, he was agitated, troubled, anxious. The same thing may occur now, and often does occur, whenpeople rely on their own strength; their health; their wealth. Suddenly any of these may be swept away; suddenly they are often swept away, to teach such men - even good men - their dependence on God, and to show them how vain is every other refuge.

Thou didst hide thy face - Thou didst show thyself displeased with me for my pride and forgetfulness of thee: and then I found how vainly I had trusted in an arm of flesh.

LORD, by thy favour thou hast made my (h) mountain to stand strong: thou didst hide thy face, [and] I (i) was troubled.
(h) I thought you had established me in Zion most surely.
(i) After you had withdrawn your help, I felt my misery.

Lord, by thy favour thou hast made my mountain to stand strong,.... The psalmist found himself mistaken, and acknowledges it; that as it was not owing to his own merit that he enjoyed the prosperity that he did, so neither was the continuance of it owing to his goodness, power, and strength, but to the free grace and favour of God; as the church of God is compared to a mountain, and the several individuals of believers are like to Mount Zion, so the soul of a child of God may be called his mountain, which is made strong by the Lord as to its state in Christ, being set on him, the Rock of ages, and sure foundation, where it is safe and secure; and as to its grace, whenever it is in any strong exercise, which is altogether owing to the favour of God, and continues as long as he pleases;
thou didst hide thy face, and I was troubled; the Lord may hide his face from his people, and yet their state be safe; their mountain stands strong in that respect; yet this generally produces a change of frames; it gives trouble, and faith and hope become feeble and languid in their acts and exercises; this shows the changeableness of frames, that they are not to be depended upon; that they are entirely owing to the pleasure of God, and that rejoicing only should be in him: very likely some regard is had to the affair of Absalom's rebellion, which came unawares, unthought of, when David was in the greatest prosperity and security.

troubled--confounded with fear (Psalm 2:5).

Mountain - My kingdom: kingdoms are usually called mountains in prophetical writings.