Emanuel Swedenborg spoke with angels and learned that their language may be written down and that there are many books in heaven. The purpose of writing in heaven is for the sake of the Word.
Emanuel Swedenborg (1688-1772) visited the Spiritual World and recorded what he heard and saw. He shared his experiences so people could learn about the life after death and the nature of our eternal choice for heaven or hell.
The Lord came to earth as a baby, as the Word made flesh. He came to our earth because writing has existed here since ancient times. The Written Word is for people on earth and angels in heaven.
The disciple John saw a prophetic vision of seven seals on a scroll being opened. These describe spiritual judgment that took place as the inner meaning of the Word was revealed.
John's vision of the Lord on a white horse appeared just before the descent of the Holy City. The Holy City could not descend until the angels of heaven fought against evil. The Lord on the white horse pictures this battle.