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.

'To roll away the stone from the door of the lord's sepulcher,' as in Matthew 28:2, signifies the removal by the Lord, of all the falsity which intercepted and hindered approach to Him, and so opening divine truth. (Apocalypse Explained 400[14])

(Odkazy: Apocalypse Explained 400)