[4] The promise is not inconsistent with the fact that Joshua's troops were defeated by the men of Ai. In such promises there is an implied condition of steadfast regard to God's will on the part of those who receive them, and this condition was violated at Ai, not by Joshua, indeed, but by one of his people. And this was no vague, indefinite assurance. It was sharply defined by a well-known example in the immediate past--"As I was with Moses, so I will be with thee." In what a remarkable variety of dangers and trials God was with Moses! Now he had to confront the grandest monarch on earth, supported by the strongest armies, and upheld by what claimed to be the mightiest gods. Again he had to deal with an apostate people, mad upon idols, and afterwards with an excited mob, ready to stone him. Anon he had to overcome the forces of nature and bend them to his purposes; to call water from the rock, to sweeten the bitter fountain, to heal the fiery bite, to cure his sister's leprous body, to bring down bread from heaven, and people the air with flocks of birds. Moreover, he had to be the messenger of the covenant between God and Israel, to unfold God's law in its length and breadth and in all its variety of application, and to obtain from the people a hearty compliance--"All that the Lord hath said unto us, that will we do." What a marvellous work Moses did! What a testimony his life presented to the reality of the Divine presence and guidance, and what a solid and indefeasible ground of trust God gave to Joshua when He said, "As I was with Moses, so will I be with thee."