When the Lord blesses us, it means that He speaks a Good Word over us, which means the very power that brought Creation into being comes to our aid.

Numbers 6:22–27 (ESV): 22 The LORD spoke to Moses, saying, 23 “Speak to Aaron and his sons, saying, Thus you shall bless the people of Israel: you shall say to them,

24 The LORD bless you and keep you;
25 the LORD make his face to shine upon you and be gracious to you;
26 the LORD lift up his countenance upon you and give you peace.

27 “So shall they put my name upon the people of Israel, and I will bless them.”

Luke 24:50–53 (ESV): 50 And he led them out as far as Bethany, and lifting up his hands he blessed them. 51 While he blessed them, he parted from them and was carried up into heaven. 52 And they worshiped him and returned to Jerusalem with great joy, 53 and were continually in the temple blessing God.