How did Hashem's reply answer Moshe's request to cross the Yarden?
Rashi: Moshe added to his request "ve'Er'eh es ha'Aretz ha'Tovah ... ", to which Hashem is giving a positive reply
Sifsei Chachamim: And not just Yerushalayim and the Beis-Hamikdash, which is what he assked to see.
Since Hashem did not want to bring Moshe to the land, why did He show it to him? This will pain him!
Refer to Bamidbar 27:13:152:1-4.