Moses encouraged Joshua , his successor, to take courage on the basis of all that God had done for Israel thus far, especially in defeating Sihon and Og ( Deuteronomy 3:21-22). A better translation of Deuteronomy 3:22 is "... for Yahweh [1] your Elohim [2], He [3] is the one fighting for you." Israel"s future success was certain because of Israel"s God, not because of Israel"s strength or wisdom. [source][source][source]
Moses was so eager to see the Promised Land that he requested permission to enter it even for just a brief visit ( Deuteronomy 3:23-25). Because of his sin, which the people provoked by their incessant complaining but which Moses did not shirk responsibility for, God did not permit this ( Deuteronomy 3:26). God did, however, allow Moses to view the land from a good vantage point ( Deuteronomy 3:27; cf. Deuteronomy 34:1-3). [source][source][source]
"In this section we also have one of Moses" prayers ( Deuteronomy 3:23-29). These prayers contribute to a profile of Moses as a type or model figure that is anticipatory of later figures in the biblical tradition. The primary components of this profile show Moses as a suffering servant [4], teacher (see discussion of Deuteronomy 5:22-33), intercessor (see ch9), and prophet (see Deuteronomy 18:9-22)." [5][source]
God charged Moses with encouraging Joshua further ( Deuteronomy 3:28). It is much easier to live by sight than by faith in God"s promises. [source][source][source]