Num 6:22-27 The LORD spoke to Moses, saying, “Speak to Aaron and his sons, saying, Thus you shall bless the people of Israel: you shall say to them, The LORD bless you and keep you; the LORD make his face to shine upon you and be gracious to you; the LORD lift up his countenance upon you and give you peace. “So shall they put my name upon the people of Israel, and I will bless them.”
“The blessing of God is the goodness of God in action, by which a supply of all good pours down to us from His good favor as from their only fountain which signifies that He alone is the defender of tHis people, and that it is He who preserves them with His guardian care. (Calvin)
“Jehovah make His face shine upon thee, and be gracious unto thee,” defined the blessing more closely as the manifestation of the favor and grace of God. The face of God is the personality of God as turned towards man. “Jehovah lift up His face to thee, and set (or give) thee peace” (good, salvation), set forth the blessing of God as a manifestation of power, or a work of power upon man, the end of which is peace (shalom), the sum of all the good which God sets, prepares, or establishes for His people. The blessing, he says, desired for the people “that God would give them prosperity and every good, and also guard and preserve them.” This is carried out still further. He refers to “the spiritual nature and the soul,” and observes, “Just as the sun, when it rises and diffuses its rich glory and soft light over all the world, merely lifts up its face upon all the world;…so when God gives His word, He causes His face to shine clearly and joyously upon all minds, and makes them joyful and light, and as it were new hearts and new men. For it brings forgiveness of sins, and shows God as a gracious and merciful Father, who pities and sympathizes with our grief and sorrow. This also relates to the spiritual nature and the soul, and is a desire for consolation and final victory over the cross, death, the devil, and all the gates of hell, together with the world and the evil desires of the flesh. The desire of this blessing is, that the Lord God will lift up the light of His word upon us, and so keep it over us, that it may shine in our hearts with strength enough to overcome all the opposition of the devil, death, and sin, and all adversity, terror, or despair.”) (Keil)