Musar к Бамидбар 17:8

עלה ראש הפסגה ושא עיניך ימה וצפונה ותימנה ומזרחה. In this verse (4,27) G–d begins to explain to Moses that he had erred when he thought that his being allowed to defeat Sichon and Og was proof that He had rescinded His decree against his leading the Jewish people in their conquest of the West bank of the Jordan. G–d wanted to show Moses with his own eyes that the lands of Sichon and Og were not part of the Holy land, i.e. the area of 400 by 400 Parsot that are traditionally considered the area of ארץ ישראל (Rashi Numbers 17,8). Moses could encompass a tremendous area with his eyes. This is why the Torah uses the extra word בעיניך. When someone is told to raise his eyes and see, it is clear that he is meant to use his eyes to see with. The Torah wanted us to know that Moses' eyes were special. Only he was able to see the whole extent of the land of Israel with his physical eyes, unassisted by something supernatural. He could convince himself that the 400 square Parsot made up the land west of the Jordan, without including any part of the lands formerly owned by Sichon and Og. The מלחמת מצוה, the "holy war" to conquer those 400 square Parsot across the river Jordan, was a task wholly reserved for Joshua. G–d's decree had not been rescinded. G–d added that He would actually have allowed Joshua also to lead in the conquest of the lands of Sichon and Og although they did not belong to ארץ ישראל proper, had it not been for the need to strengthen Joshua by visual example, as described in 4,28. Once Joshua had witnessed how Moses had successfully defeated the mighty kings Sichon and Og and conquered their lands he would be able to summon the courage to lead the people of Israel in their battles with the 31 kings on the West bank of the Jordan. This is why the Torah had mentioned at the end of the last פרשה, (3,21) that Moses had commanded Joshua not to be afraid since he had seen with his own eyes what the Lord had done to those two kings.