258. Written Materials in Heaven
Since angels do have language and their language is one of words, they also have written materials; and through those written materials just as through their conversation, they express what their minds are sensing. I have sometimes been sent pages covered with writing, just like pages handwritten or printed and published in our world. I could even read them in much the same way, but I was not allowed to get more out of them than a bit of meaning here and there. This was because it is not in keeping with the divine design to be taught by written materials from heaven, but [only] by the Word, since this is the sole means of communication and union between heaven and earth, and therefore between the Lord and humanity.
We gather from Ezekiel that pages written in heaven appeared to the prophets as well:
When I looked, behold, a hand was stretched out to me by the spirit, and in it the scroll of a book that he unrolled in my sight. It was written on the front and on the back. (Ezekiel 2:9-10)
And in John,
I saw in the right hand of the one who was sitting on the throne a book written within and on the back, sealed with seven seals. (Revelation 5:1)