The John referred to in Doctrine and Covenants 93 is John the Beloved. It is not known if he was a witness to Jesus’ baptism, but he is testifying of its truthfulness.
The Book of Jubilees was written between 135 and 105 B.C. It is a rewritten history from the creation to Moses on Sinai, interpreted by its Pharisee author.
The prophet Nehemiah called God “great and terrible” because of the judgements he had sent against the rebellious Israelites.
Mormonism teaches that there were two aspects of creation: spiritual and physical. The spiritual creation can be likened to a blueprint.
The twelve apostles at Jerusalem will pass judgment on everyone in that lineage except for the Nephites and Lamanites, who had their own twelve.
The Davidic Servant spoken of in the scriptures is to come from the line of ancient King David and will build the temple in Palestine. He is yet to appear.
Mormon Church leader Joseph Smith did see the sword of Laban in the Hill Cumorah and it was one of the relics given to him with the golden plates.
The fulness of the everlasting gospel is contained in the Bible because the Book of Mormon says so.
Intelligences are eternal entities from which all living things are created. Intelligences cannot be created, they have always existed.
The north countries spoken of in the Mormon Doctrine and Covenants is currently unknown, as is most information concerning the lost tribes of Israel. Some obscure scriptures will only be understood as they are fulfilled.