“And this is the blessing with which Moshe the man of God blessed the children of Israel before his death.” (Devarim, 33:1) “The man of God” means that God delivered the matter into the hands of Moshe at that time. Just as he would bless, and just as he would arrange an account of what would happen to Israel until the end of all generations, thus God would agree and so it would be. Also, just as Moshe would arrange just how much Divine service would be necessary for each soul in Israel, so it would be.
וְזֹאת הַבְּרָכָה אֲשֶׁר בֵּרַךְ מֹשֶׁה אִישׁ הָאֱלֹקִים. "אִישׁ הָאֱלֹקִים", הַיְינוּ, שֶׁהַש"י הִמְסִיר הַדָּבָר בְּיַד מֹשֶׁה בָּעֵת הַזֹּאת כְּפִי שֶׁיְּבָרֵךְ וּכְפִי אֲשֶׁר יְסַדֵּר עַד סוֹף כָּל הַדּוֹרוֹת מַה יַּעֲבֹר עַל יִשְׂרָאֵל כֵּן הִסְכִּים הַש"י, וְכֵן כְּפִי אֲשֶׁר אֲשֶׁר יְסַדֵּר כַּמָּה עֲבוֹדָה יוּצְטָרֵךְ לְכָל נֶפֶשׁ מִיִּשְׂרָאֵל כֵּן יָקוּם.
“And this is the blessing with which Moshe the man of God blessed the children of Israel before his death.” (Devarim, 33:1)
“The man of God” means that God delivered the matter into the hands of Moshe at that time. Just as he would bless, and just as he would arrange an account of what would happen to Israel until the end of all generations, thus God would agree and so it would be. Also, just as Moshe would arrange just how much Divine service would be necessary for each soul in Israel, so it would be.