The Beast archetype also appears as the Zoroastrian deity, Ahriman.
And again we see the monster in battle:
The image of the monster being engaged in battle points to delusion and lack of faith. The basic idea is not trusting G-d's presence in the world, getting caught up in fearful defensiveness, and then becoming identified with a blind attachment to one's own powers of destruction:
Ormazd, the eternally wise and good lord, and Ahriman, the ignorant lord of evil existed in the beginning. Ormazd knew of Ahriman, but Ahriman knew not of Ormazd.
Ormazd began creation, and this act scared Ahriman so that he declared war on it from the beginning. Ormazd told Ahriman he need not declare war on creation, but Ahriman was suspicious and continued his conflict.
http://library.thinkquest.org/29064/summaries/iran.html
There is a technical term for this kind of delusion, lack of faith, fear, and idolatrous attachment: foolishness.