Be strong and of good courage; for you shall cause this people to inherit the land which I swore to their fathers to give them.
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. 