2 Bible Verses about Books, Metaphorical Use

And I saw a great white throne, and him sitting on it, from whose face the earth and the heaven fled away; and there was found no place for them. And I saw the dead, great and small, standing before the throne; and the books were opened, and another book was opened, which is the book of life: and the dead were judged out of the things which were written in the books, according to their works.

And I went away to the angel, saying to him, to give me the little book. He says to me, Take it, and eat it up; and it will make your stomach bitter, but in your mouth it will be sweet as honey. And I took the little book out of the hand of the angel, and I ate it up; and it was in my mouth sweet as honey: and when I ate it, my stomach was bitter.