Be strong and of a good courage, fear not, nor be afraid of them: for the Lord thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee. (Deuteronomy 31:6)
This promise had been given before (see ch. 20:4).
Not fail … thee.
See the promise made to Joshua after the death of Moses (Joshua 1:5). The apostle Paul applies this experience to the Christian church (see Heb. 13:5). Moses had lived a long and eventful life. He had served God and His people unselfishly and tirelessly. On earth he could never be greater than he was at that moment; yet God had more in store for him, in the heavenly Canaan. Compare the experience of Paul (2 Tim. 4:6-8).