311 Then Moses went and spoke these words to all Israel. 2 And he said to them: "I am one hundred and twenty years old today. I can no longer go out and come in. Also the Lord has said to me, 'You shall not cross over this Jordan.' 3 The Lord your God Himself crosses over before you; He will destroy these nations from before you, and you shall dispossess them. Joshua himself crosses over before you, just as the Lord has said. 4 And the Lord will do to them as He did to Sihon and Og, the kings of the Amorites and their land, when He destroyed them. 5 The Lord will give them over to you, that you may do to them according to every commandment which I have commanded you. 6 Be strong and of good courage, do not fear nor be afraid of them; for the Lord your God, He is the One who goes with you. He will not leave you nor forsake 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.