How Lincoln talked like the King James Bible in the Gettysburg address

Why would Abraham Lincoln begin the Gettysburg Address with “Fourscore and seven years ago …” with language that was archaic for its time? Didn’t he wish to speak directly to the people in words that they would understand? Yes, of course; but Lincoln was talking to a people deeply divided by war and yet united by a respect for the Bible. He was echoing the language of the KING JAMES BIBLE. He was, in fact, using the language of the KJV because it would be heard by his listeners as the language of God. Fourscore appears a total of forty-six times in the KJV, first in Genesis 16:16: “And Abram was fourscore and six years old, when Hagar bare Ishmael to Abram.”