3. Though the waters thereof roar, etc. This verse ought to be read in connection with the verse which follows, because it is necessary to complete the sense, as if it had been said: Though the waters of the sea roar and swell, and by their fierce impetuosity shake the very mountains -- even in the midst of these dreadful tumults, the holy city of God will continue to enjoy comfort and peace, satisfied with her small streams. The relative pronoun her, according to the common usage of the Hebrew language, is superfluous in this place. The prophet intended simply to say, that the small streams of a river would afford to the holy city abundant cause of rejoicing, though the whole world should be moved and destroyed. I have already mentioned shortly before how profitable is the doctrine taught us in this place, that our faith is really and truly tested only when we are brought into very severe conflicts, and when even hell itself seems opened to swallow us up. In like manner, we have portrayed to us the victory of faith over the whole world, when, in the midst of the utmost confusion, it unfolds itself, and begins to raise its head in such a manner as that although the whole creation seem to be banded together, and to have conspired for the destruction of the faithful, it nevertheless triumphs over all fear. Not that the children of God, when placed in peril, indulge in jesting or make a sport of death, but the help which God has promised them more than overbalances, in their estimation, all the evils which inspire them with fear. The sentiment of Horace is very beautiful, when, speaking of the righteous man and the man who feels conscious of no guilt, he says, (Car., Lib. iii., Od. 3,)

"Dux inquieti turbidus Adriae,
Nec fulminantis magna Jovis manus,
Si fractus illabitur orbis,
Impavidum ferient ruinae."

"Let the wild winds that rule the seas,
Tempestuous, all their horrors raise;
Let Jove's dread arm with thunders rend the spheres;
Beneath the crush of worlds undaunted he appears."²

But as no such person as he imagines could ever be found, he only trifles in speaking as he does. Their fortitude, therefore, has its foundation in the assurance of the divine protection alone, so that they who rely upon God, and put their trust in him, may truly boast, not only that they shall be undismayed, but also that they shall be preserved in security and safety amidst the ruins of a falling world.

The prophet says expressly, that the city of God shall be glad, although it had no raging sea, but only a gently flowing stream, to set for its defense against those waves of which he has made mention. By this mode of expression he alludes to the stream which flowed from Shiloah, and passed through the city of Jerusalem. Further, the prophet, I have no doubt, here indirectly rebukes the vain confidence of those who, fortified by earthly assistance, imagine that they are well protected, and beyond the reach of all danger. Those who anxiously seek to strengthen themselves on all sides with the invincible helps of the world, seem, indeed, to imagine that they are able to prevent their enemies from approaching them, just as if they were environed on all sides with the sea; but it often happens that the very defenses which they had reared turn to their own destruction, even as when a tempest lays waste and destroys an island by overflowing it. But they who commit themselves to the protection of God, although in the estimation of the world they are exposed to every kind of injury, and are not sufficiently able to repel the assaults made upon them, nevertheless repose in security. On this account, Isaiah (Isaiah 8:6) reproves the Jews because they despised the gently flowing waters of Shiloah, and longed for deep and rapid rivers.

In that passage, there is an elegant antithesis between the little brook Shiloah on the one hand, and the Nile and Euphrates on the other; as if he had said, They defraud God of his honor by the unworthy reflection, that when he made choice of the city of Jerusalem, he had not made the necessary provision in respect of strength and fortifications for its defense and preservation. And certainly, if this psalm was written after the slaughter and flight of the army of Sennacherib, it is probable that the inspired writer purposely made use of the same metaphor, to teach the faithful in all ages, that the grace of God alone would be to them a sufficient protection, independent of the assistance of the world. In like manner, the Holy Spirit still exhorts and encourages us to cherish the same confidence, that, despising all the resources of those who proudly magnify themselves against us, we may preserve our tranquillity in the midst of disquietude and trouble, and not be grieved or ashamed on account of our defenseless condition, so long as the hand of God is stretched out to save us. Thus, although the help of God comes to our aid in a secret and gentle manner, like the still flowing streams, yet it imparts to us more tranquillity of mind than if the whole power of the world were gathered together for our help. In speaking of Jerusalem as the sanctuary of the tabernacles of the Most High, the prophet makes a beautiful allusion to the circumstances or condition of that time: for although God exercised authority over all the tribes of the people, yet he made choice of that city as the seat of royalty, from which he might govern the whole nation of Israel. The tabernacles of the Most High were scattered throughout all Judea, but still it was necessary that they should be gathered together and united in one sanctuary, that they might be under the dominion of God.

5. God is in the midst of her; she shall not be moved. The Psalmist now shows that the great security of the Church consists in this, that God dwells in the midst of her; for the verb which we translate, shall be moved, is of the feminine gender, nor can it be referred to God, as if it were designed to teach that God is immovable. The sentence must be explained in this way, The holy city shall not be moved or shaken, because God dwells there, and is always ready to help her. The expression, the dawn of the morning³ denotes daily, as soon as the sun rises upon the earth. The sum of the whole is, If we desire to be protected by the hand of God, we must be concerned above all things that he may dwell amongst us; for all hope of safety depends upon his presence alone. And he dwells amongst us for no other purpose than to preserve us uninjured. Moreover, although God does not always hasten immediately to our aid, according to the importunity of our desires, yet he will always come to us seasonably, so as to make apparent the truth of what is elsewhere said,

"Behold, he that keepeth Israel shall neither slumber nor sleep," (Psalm 121:4.)