"Be thy head anointed with holy oil: as kings, priests, and prophets were anointed. And as Solomon was anointed king by Zadok the priest and Nathan the prophet, so be you anointed, blessed and consecrated Queen over the Peoples, whom the Lord thy God hath given thee to rule and govern
But where in the Bible does it associate this promise with the Windsor family or any other modern monarchy? Absolutely anybody could claim that something in the Bible applies specifically to them and then, before long, it becomes 'true because we know it must be true'.
It does say in the Bible that it wasn't God's plan for there to be a monarch at all, but the people demanded one, so God allowed them to have one.
I've also never found any explanation about a weird phrase that the Queen said to Charles at his inauguration as PoW: "This dragon gives you your power, your throne, and your authority." Was 'this dragon' meant to represent Wales? If so, how come the country itself is giving power to its own ruler, ergo to itself, if the whole justification of monarchy is meant to be that it is the absolute gift of God?
More to the point, why was the Queen quoting Revelation 13:2 - referring to the Antichrist - and claiming it as the source of the power of a supposedly Judeo-Christian divinely-instituted monarchy?