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.

(Odkazy: Apocalypse Revealed 270)

539. And ten horns. This symbolizes much power. A horn symbolizes power (no. 270), and the number ten symbolizes much (no. 101).

The dragon is said to have much power because the salvation of mankind by faith alone apart from works of the Law - the faith meant by the dragon - captivates hearts, and then arguments in support of it persuade them. It captivates, indeed, because when a person hears that the condemnation of the Law has been taken away and that the Lord's merit is imputed to him simply by faith in that fact, he can indulge the appetites of his heart and body, without any fear of hell. This gives that faith power, which is symbolized by the dragon's ten horns. That it has had that power is clearly apparent from the acceptance of that faith throughout the whole Protestant Reformed Christian world.