311 So Moses said all these things to Israel. 2 Then he said to them, I am now a hundred and twenty years old; I am no longer able to go out and come in: and the Lord has said to me, You are not to go over Jordan. 3 The Lord your God, he will go over before you; he will send destruction on all those nations, and you will take their land as your heritage: and Joshua will go over at your head as the Lord has said. 4 The Lord will do to them as he did to Sihon and to Og, the kings of the Amorites, and to their land, whom he put to destruction. 5 The Lord will give them up into your hands, and you are to do to them as I have given you orders. 6 Be strong and take heart, and have no fear of them: for it is the Lord your God who is going with you; he will not take away his help from you.
Matthew Henry's Commentary on Deuteronomy 31:1-6
Commentary on Deuteronomy 31:1-8
(Read Deuteronomy 31:1-8)
Moses assures Israel of the constant presence of God with them. This is applied by the apostle to all God's spiritual Israel, to encourage their faith and hope; unto us is this gospel preached, as well as unto them; he will never fail thee, nor forsake thee, Hebrews 13:5. Moses commends Joshua to them for a leader; one whose wisdom, and courage, and affection they had long known; one whom God had appointed to be their leader; and therefore would own and bless. Joshua is well pleased to be admonished by Moses to be strong and of good courage. Those shall speed well, who have God with them; therefore they ought to be of good courage. Through God let us do valiantly, for through him we shall do victoriously; if we resist the devil, he will flee from us.