Psalms 18:2

2.Jehovah is my rock, etc. When David thus heaps together many titles by which to honor God, it is no useless or unnecessary accumulation of words. We know how difficult it is for men to keep their minds and hearts stayed in God. They either imagine that it is not enough to have God for them, and, consequently, are always seeking after support and succor elsewhere, or, at the first temptation which assails them, fall from the confidence which they placed in him. David, therefore, by attributing to God various methods of saving his people, protests that, provided he has God for his protector and defender, he is effectually fortified against all peril and assault; as if he had said, Those whom God intends to succor and defend are not only safe against one kind of dangers, but are as it were surrounded by impregnable ramparts on all sides, so that, should a thousand deaths be presented to their view, they ought not to be afraid even at this formidable array. (388) We see, then, that the design of David here is not only to celebrate the praises of God, in token of his gratitude, but also to fortify our minds with a firm and steadfast faith, so that, whatever afflictions befall us, we may always have recourse to God, and may be fully persuaded that he has virtue and power to assist us in different ways, according to the different methods of doing us mischief which the wicked devise. Nor, as I have observed before, does David insist so much on this point, and express the same thing by different terms without cause. God may have aided us in one way, and yet whenever a new tempest arises, we are immediately stricken with terror, as if we had never experienced any thing of his aid. And those who in one trouble expect protection and succor from him, but who afterwards circumscribe his power, accounting it limited in other respects, act like a man who upon going into battle, considers himself well secured as to his breast, because he has a breastplate and a shield to defend him, and yet is afraid of his head, because he is without a helmet. David, therefore, here furnishes the faithful with a complete suit of armor, (389) that they may feel that they are in no danger of being wounded, provided they are shielded by the power of God. That such is the object he has in view, is apparent from the declaration which he makes of his confidence in God: I will trust in him Let us, therefore, learn from his example, to apply to our own use those titles which are here attributed to God, and to apply them as an antidote against all the perplexities and distresses which may assail us; or rather, let them be deeply imprinted upon our memory, so that we may be able at once to repel to a distance whatever fear Satan may suggest to our mind. I give this exhortation, not only because we tremble under the calamities with which we are presently assailed, but also because we groundlessly conjure up in our own imaginations dangers as to the time to come, and thus needlessly disquiet ourselves by the mere creations of fancy. In the song, as recorded in 2 Samuel 22:3, instead of these words, My God, my rock, it is, God of my rock. And after the word refuge, there is, My fortress, my savior, thou shalt preserve me from violence; words which make the sentence fuller, but the meaning comes to the same thing.