REMINDER: NOT A TEACHER
(1) What a great question.
(2) I think that you will get some very interesting answers from posters.
(3) I think (think!) that the English is certainly "grammatically correct" for the
time in which it was written. And some of the syntax and vocabulary are even
used today in poetry and super elegant speech.
(4) I just opened my King James version and saw this (Proverbs 16:32):
He that is slow to anger is better than the mighty; and he that ruleth his
spirit than he that taketh a city.
(a) As you can, it uses "that" for the relative pronoun. Even today, "that" is
acceptable (better?) in certain sentences when referring to people, and -- of course --
the biggest (and most beautiful difference) is the use of "th" instead of
"s." I have read that there was a "contest" in England many years ago between
"th" and "s." Sadly (in my opinion), the users of "s" won the "competition."
Student or Learner