Martin Luther -- Your Kingdom Come
As the head of the family should teach it in a simple way to his household.
What does this mean?
Answer: Truly God's Kingdom comes by itself, without our prayer. But we pray in this request that it come to us as well.
How does this happen?
Answer: When the Heavenly Father gives us His Holy Spirit, so
that we believe His holy Word by His grace and live godly lives here
in this age and there in eternal life.