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5. There shall not any man, etc As a contest was about to be waged with numerous and warlike enemies, it was necessary thus to inspire Joshua with special confidence. But for this, the promise of delivering over the land which God had given, would ever and anon have become darkened; for how vast the enterprise to overthrow so many nations! This objection therefore is removed. And the better to free him from all doubt, he is reminded of the victories of Moses, by which God had made it manifest that nothing was easier for him than utterly to discomfit any host however great and powerful. Joshua, therefore, is ordered to behold in the assistance given to Moses the future issue of the wars which he was to undertake under the same guidance and protection. For the series of favors is continued without interruption to the successor.

What follows is to the same effect, though it is more fully expressed by the words, I will not fail thee, etc Hence the Apostle, (Hebrews 13:5,) when wishing to draw off believers from avarice, makes an application of these words for the purpose of calming down all anxieties, and suppressing all excessive fears. And in fact, the distrust which arises from anxiety kindles in us such tumultuous feelings that on the least appearance of danger, we turmoil and miserably torment ourselves until we feel assured that God both will be with us and more than suffice for our protection. And, indeed, while he prescribes no other cure for our timidity, he reminds us that we ought to be satisfied with his present aid.

6. Be strong, etc An exhortation to fortitude is added, and indeed repeated, that it may make the deeper impression. At the same time the promise is introduced in different words, in which Joshua is assured of his divine call, that he might have no hesitation in undertaking the office which had been divinely committed to him, nor begin to waver midway on being obliged to contend with obstacles. It would not have been enough for him diligently to begirt himself at the outset without being well prepared to persevere in the struggle.

Although it is the property of faith to animate us to strenuous exertion, in the same way as unbelief manifests itself by cowardice or cessation of effort, still we may infer from this passage, that bare promises are not sufficiently energetic without the additional stimulus of exhortation. For if Joshua, who was always remarkable for alacrity, required to be incited to the performance of duty, how much more necessary must it be that we who labor under so much sluggishness should be spurred forward.

We may add, that not once only or by one single expression are strength and constancy required of Joshua, but he is confirmed repeatedly and in various terms, because he was to be engaged in many and various contests. He is told to be of strong and invincible courage. Although these two epithets make it obvious that God was giving commandment concerning a most serious matter, still not contented with this reduplication, he immediately after repeats the sentence, and even amplifies it by the addition of the adverb very.

From this passage, therefore, let us learn that we can never be fit for executing difficult and arduous matters unless we exert our utmost endeavors, both because our abilities are weak, and Satan rudely assails us, and there is nothing we are more inclined to than to relax our efforts. ²¹²¹     French, “Et il ne faut qu’un rien pour nous faire perdre courage;” “and a mere nothing is all that is necessary to make us lose courage.” — Ed. But, as many exert their strength to no purpose in making erroneous or desultory attempts, it is added as a true source of fortitude that Joshua shall make it his constant study to observe the Law. By this we are taught that the only way in which we can become truly invincible is by striving to yield a faithful obedience to God. Otherwise it were better to lie indolent, and effeminate than to be hurried on by headlong audacity.

Moreover, God would not only have his servant to be strong in keeping the Law, but enjoins him to contend manfully, so as not to faint under the burden of his laborious office. But as he might become involved in doubt as to the mode of disentangling himself in matters of perplexity, or as to the course which he ought to adopt, he refers him to the teaching of the Law, because by following it as a guide he will be sufficiently fitted for all things. He says, You shall act prudently in all things, provided you make the Law your master; although the Hebrew word שכל, means to act not only prudently but successfully, because temerity usually pays the penalty of failure.

Be this as it may, by submitting entirely to the teaching of the Law he is more surely animated to hope for divine assistance. For it is of great consequence, when our fears are excited by impending dangers, to feel assured that we have the approbation of God in whatever we do, inasmuch as we have no other object in view than to obey his commands. Moreover, as it would not be enough to obey God in any kind of way, ²²²²     The French adds, “Ou en quelques points;” “Or in some points.” — Ed. Joshua is exhorted to practice a modesty and sobriety which may keep him within the bounds of a simple obedience.

Many, while possessed of right intention, sometimes imagine themselves to be wiser than they ought, and hence either overlook many things through carelessness, or mix up their own counsels with the divine commands. The general prohibition, therefore, contained in the Law, forbidding all men to add to it or detract from it, God now specially enforces on Joshua. For if private individuals in forming their plan of life behoove to submit themselves to God, much more necessary must this be for those who hold rule among the people. But if this great man needed this curb of modesty that he might not overstep his limits, how intolerable the audacity if we, who fall so far short of him, arrogate to ourselves greater license? More especially, however, did God prescribe the rule of his servant, in order that those who excel in honor might know that they are as much bound to obey it as the meanest of the people.