2 Bible Verses about Books, Metaphorical Use

And I saw a great white throne, and him who sat on it, from whose face earth and heaven fled away, and there was found no place for them. And I saw the dead, small and great, standing before God; 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 written in the books, according to their works.

And I went to the angel, and said to him, Give me the little book. And he said to me, Take it, and eat it up; and it shall embitter your stomach, but in your mouth it shall be as sweet as honey. And I took the little book out of the hand of the angel, and eat it up; and in my mouth it was sweet as honey, but when I had eaten it, my stomach was bitter.