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.