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.
Psalms 51:14-19
14
Deliver me from bloodguiltiness, O God, the God of my salvation. My tongue shall sing aloud of your righteousness.
15
Lord, open my lips. My mouth shall declare your praise.
16
For you don't delight in sacrifice, or else I would give it. You have no pleasure in burnt offering.
17
The sacrifices of God are a broken spirit. A broken and contrite heart, O God, you will not despise.
18
Do well in your good pleasure to Zion. Build the walls of Jerusalem.
19
Then you will delight in the sacrifices of righteousness, in burnt offerings and in whole burnt offerings. Then they will offer bulls on your altar. For the Chief Musician. A contemplation by David, when Doeg the Edomite came and told Saul, "David has come to Abimelech's house."
