Sound of a millstone
In Jeremiah 25:10, this signifies exultation of heart from the good of love. (Apocalypse Explained 1182)
Vanity
'Vanity' signifies evil and the falsity of evil. 'Vanities of strangers' signify falsities of religion.
In Exodus 5:9, vain words signify truths when said by people who believe falsities. (Arcana Coelestia 7122)
(Odkazy: Apocalypse Explained 340)