The Lord bless thee, and keep thee.

“יברכך [THE LORD] BLESS THEE — that thy property may increase (Sifrei Bamidbar 40). וישמרך AND MAY HE GUARD THEE — that no robbers come upon thee to take away thy property. For a human being who gives a present to his servant cannot guard him against everybody, and if a band of robbers attack him and take it away, what pleasure can he, then, derive from this present?! The Holy One, blessed be He, however, both gives and guards — against everybody (Midrash Tanchuma, Nasso 10). Many Midrashic interpretations are given of this verse in the Sifrei (Sifrei Bamidbar 40).”

“THE ETERNAL BLESS THEE, AND KEEP THEE. By way of the Truth, [the mystic teachings of the Cabala], the meaning thereof is because “the blessing” comes from on High [downward], and the meaning of shmirah [“keeping” — and He ‘keep’ thee] is that you should “keep” it, like Remember [the Sabbath-day], and ‘Shamor’ (Keep) the Sabbath-day. Furthermore, the Great Name will make His countenance that watches over you shine [upon you]. And so did the Rabbis say in the Sifre: 41. “Rabbi Nathan says: [The Eternal make His countenance shine upon thee.] This is a reference to the light of the Divine Presence.” And He be gracious unto thee, that you may find favor in His sight, similar to that which the Rabbis have said [that when G-d completed the creation of the world He said]: “My world! My world! Would that you will find favor in My sight all the time [as at this moment]!” Furthermore, the Eternal lift up His countenance to the heavens above and give thee peace — all in your house. And so the Rabbis said in the Sifre: 42. “[And He give thee peace.] Rabbi Nathan said: This is a reference to the peace of the kingdom of David.” So shall they put My Great Name upon the children of Israel, and I will bless them, for it is I that speaketh, behold, here I am, and peace.”

“The Lord make his face to shine upon thee,.... Cause himself, the sun of righteousness, to arise and shine upon them, and give both spiritual light and heat unto them; grant his gracious presence, the manifestations of himself, communion with him, clearer discoveries of his love, of interest in him, and an increase of spiritual light and knowledge of his Gospel, and the truths of it, and of his mind and will: and be gracious unto thee; by granting larger measures of grace out of his fulness, by leading more abundantly into it, and making fresh and frequent applications of it; grace is often wished for from Christ as well as from the Father.”