Genesis 22:13. Horn = Power of truth from good; Divine power; sometimes self-exaltation. (Arcana Coelestia 2832, 10182)

In Genesis 22:13, this signifies with all power as to the truths of faith. (Arcana Coelestia 2832) Horns are mentioned in the Word here and there, and signify the power of truth from good, or, in the opposite sense, of falsity from evil. Here they signify that the spiritual are entangled in external knowledges of the natural with all power as to truth; but are deprived of the power of receiving truth. (Arcana Coelestia 2832)

In Revelation 8:11, this signifies power in speaking, teaching, and writing, consequently, in reasoning and arguing.

'The little horn that rose up,' as mentioned in Daniel 7:3-8, signifies the full perversion of the Word by the application of its literal sense to the confirmation of the love of dominion. It is called 'little,' because such perverted application is not sensibly apparent to the understanding of a person, or to the sight of his spirit.

When spoken of the Lord, a 'horn' signifies omnipotence. It also stands for the power of truth from good.

(References: Apocalypse Revealed 270)

317. And seven eyes, signifies and who has omniscience. This is evident from the signification of "seven eyes" as being, in reference to the Lord, omniscience; for as "eyes" in reference to man signify the understanding, so in reference to the Lord they signify omniscience. That "eyes" in reference to man signify the understanding, and in reference to the Lord providence, as also Divine wisdom and intelligence, which is omniscience, see above, n. 152. "Seven eyes" are mentioned, because "seven" signifies all things, and is predicated of what is holy (as above).