May the Lord smile on you and be gracious to you.
May the Lord show you His favor and give you His peace.” (Numbers 6:24-26 NLT)
A blessing was one way of asking God’s divine favor to rest upon others. The ancient blessing in these verses helps us understand what a blessing was supposed to do. Its five parts conveyed hope that God would (1) bless and protect them; (2) smile on them (be pleased); (3) be gracious (merciful and compassionate); (4) show His favor toward them (give His approval); (5) give peace. When you ask God to bless others yourself, you are asking Him to do these five things. The blessing you offer will not only help the one receiving it, it will also demonstrate love, encourage others, and provide a model of caring for others.
-- from The Life Application Study Bible