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6. And Joshua spoke unto the priests, etc It is probable that the priests were informed why God wished the ark to precede, that they might be more ready to execute the command, for the whole people are immediately after made acquainted with the intended division of the waters. As the prefects had formerly published in the camp, that the people were to follow the ark of the covenant, the priests could not possibly be ignorant as to the office which they were to perform. For it had been distinctly declared that they were to be leaders or standard-bearers. But when all were in readiness, Joshua publicly unfolded the divine message which he had received. For it would have been incongruous to make the divine favor more clearly manifest to the common people than to them. It is added, however, immediately after, that the people were made acquainted with the miracle.

I conclude, therefore, that after the priests had for some time been kept in suspense, along with the multitude, the Lord, on ascertaining the obedience of all, publicly declared what he was to do. First, then, it is related that the priests were enjoined by Joshua to bear the ark before the people; and secondly, lest any one might think that he was making the attempt at random, or at his own hand, mention is at the same time made of the promise with which he had been furnished as a means of ensuring his command. But although it is not then distinctly said that the course of the Jordan would be interrupted, yet, from the language which Joshua used to the people, we may infer that the Lord spoke more in detail, and explained more distinctly what he had determined to do. For Joshua did not mention anything which he had not previously learned from the mouth of God himself. Nay, before he makes any mention of the matter at all, he tells them to hear the words of the Lord, and thus premises that he has the authority of God for what he is about to say.

10. Hereby you shall know, etc He makes the power of the miracle extend further than to the entrance of the land, and deservedly; for merely to open up a passage into a hostile territory, from which there was afterwards no retreat, would have been nothing else than exposure to death. For either entangled among straits, and in an unknown region, they would easily have been destroyed, or they would have perished, worn out by hunger and the absolute want of all things. Joshua therefore declares before hand, that when God would restore the river to its course, it would just be as if he were stretching forth his hand to rout all the inhabitants of the land; and that the manifestation of his power given in the passage of the Jordan, would be a sure presage of the victory which they would obtain over all the nations.

He says, Hence shall you know that the Lord is present with you; to what end? Not only to plant your feet in the land of Canaan, but also to give you full possession of it. For surely when mention is made of the overthrow of the nations, an ultimate, free, and peaceful possession is implied. Therefore, as the Lord by dividing the river clearly showed that his power resided with the Israelites, so the people must on their part have conceived hopes of perpetual assistance, as much as if they had already seen their enemies worsted and lying prostrate before them.

For God does not abandon the work of his hands midway, leaving it maimed and unfinished. (Psalm 138:8) When he leads his people unto the promised inheritance, he makes a dry passage for them by cutting off the course of the Jordan. How perverse then would it have been for the Israelites to stop short at that momentary act, instead of feeling confident in all time to come, until quiet possession of the land were actually obtained! Let us learn then from this example, prudently to combine the different acts of divine goodness relating to our final salvation, so that a happy commencement may cherish and keep alive in our minds the hope of an equally happy termination.

When Joshua says that the people will know the presence of God from the miracle, he indirectly upbraids them with their distrust, as the mere promise of God ought to have sufficed for a full assurance, and our faith, unless founded solely on this promise, must be continually wavering. But although faith ought properly to recline on the truth of God alone, it does not follow that experimental knowledge may not act as a secondary support to its weakness, and give subsidiary aid to its confirmation. For that which God promises to us in word he seals by act, and as often as he exhibits to us manifestations of his grace and might, he intends them to be so many confirmations of what he has spoken, and so many helps tending to suppress all our doubts.

11. Behold the ark of the covenant, etc First he says that the ark of God will go before; and secondly, he explains for what purpose, namely, that Jordan may retire from its place, trembling, so to speak, at the presence of the Lord, as is said in the Psalms. (Psalm 114.) The narrative introduced concerning the twelve men is parenthetical, as it only briefly alludes to what it will afterwards deliver more fully and clearly. At present let us merely understand, that while the ark went before, God displayed his power in guiding the people. And in this way there was a confirmation of the sanctity of the worship appointed by the Law, when the Israelites perceived that it was no empty symbol of his presence that God had deposited with them. For Jordan was compelled to yield obedience to God just as if it had beheld his majesty.

Let us however remember, that the only reason which induced the Lord to display his grace in the ark was because he had placed the tables of his covenant within it. Moreover, as the thing could not be easily credited, Joshua directs the mind of the people to the contemplation of the divine power, which surmounts all difficulties. The title of Ruler of the whole earth here applied to God is not insignificant, but extols his power above all the elements of nature, in order that the Israelites, considering how seas and rivers are subject to his dominion, might have no doubt that the waters, though naturally liquid, would become stable in obedience to his word.