Verse 18. - Whosoever he be that doth rebel against thy commandment. A striking fulfilment of this promise appears in the case of Achan, who was put to death by the act of the whole congregation (see Joshua 7:25; and cf. Deuteronomy 17:12). Only be strong and of a good courage. The task of a leader in Israel is easy when he is sustained by the prayers of his people, and when their exhortations are an echo of the words of God (see vers. 6, 9).

1:16-18 The people of Israel engage to obey Joshua; All that thou commandest us to do we will readily do, without murmuring or disputing, and whithersoever thou sendest us we will go. The best we can ask of God for our magistrates, is, that they may have the presence of God; that will make them blessings to us, so that in seeking this for them, we consult our own interest. May we be enabled to enlist under the banner of the Captain of our salvation, to be obedient to his commands, and to fight the good fight of faith, with all that trust in and love his name, against all who oppose his authority; for whoever refuses to obey him must be destroyed.Whosoever he be that doth rebel against thy commandment,.... Refuses to go over Jordan with his brethren the children of Israel, when commanded by Joshua so to do:

and will not hearken to thy words in all that thou commandest him; or, if he does go over, yet will not obey orders to take such a post, or go against such a city, or march into such a part of the country:

he shall be put to death; this part of military discipline they agree to, and hereby declare their entire submission to him as their general; some understand this as spoken by all Israel, and of their promise of obedience to Joshua, as their governor, in all things:

only be strong, and of a good courage; which also is not to be understood as a condition of their submission and obedience, but as a hearty wish and prayer for him, that he might have strength and courage necessary to the great work he was engaging in, and which to see would be no small encouragement to follow and obey him.