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.
1 Corinthians 6:12-15
12
"All things are lawful for me," but not All things are expedient. "All things are lawful for me," but I will not be brought under the power of anything.
13
"Foods for the belly, and the belly for foods," but God will bring to nothing both it and them. But the body is not for sexual immorality, but for the Lord; and the Lord for the body.
14
Now God raised up the Lord, and will also raise us up by his power.
15
Don't you know that your bodies are members of Christ? Shall I then take the members of Christ, and make them members of a prostitute? May it never be!