'The hooves of the horses,' as mentioned in Ezekiel 26:21, signify scientific things which pervert truths. 'The hooves of horses' signify the lowest intellectual principles. 'A hoof' signifies truth in the ultimate degree, or sensory truth.

(References: Arcana Coelestia 7729)

'Mighty,' as in Revelation 19:18, signify people who are educated about doctrine derived from the Word. By extension, 'mighty' signifies education or learning derived there.

(References: Apocalypse Revealed 832)