Horse
In Ezekiel 26:11, this signifies the love of learning or intellectual things. (Arcana Coelestia 3727)
In Revelation 6:2, this signifies the love of understanding the Word. (Apocalypse Revealed 298)
In Zechariah 12:4, this signifies that the intellectual should be filled with falsities. (Arcana Coelestia 2383[2])
In general, 'a horse' signifies knowledge or understanding of the Word. In an opposite sense it signifies the understanding of the Word falsified by reasonings, and likewise destroyed from self-derived intelligence. 'A dead horse' signifies no understanding of truth from the Word.
Ezekiel 26:20
20
then will I bring you down with those who descend into the pit, to the people of old time, and will make you to dwell in the lower parts of the earth, in the places that are desolate of old, with those who go down to the pit, that you be not inhabited; and I will set glory in the land of the living:
