The true nature of the {Beholder's Eye}, was the ability to completely, with no limits whatsoever, see through everything in all of existence.
Although that sounded like a stretch, it was, in fact, the truth.
Regardless of how powerful the spells of Abaloth were, it wouldn't change the nature of the skill itself, only the difficulty with which Cain could use it.
That was just one part.
The {Beholder's Eye} could help him see everything. But it wouldn't magically grant him comprehension.
All this time, Cain had been secretly observing not only the spells the Devil cast, but also the Magic Wheel as well.
All for one purpose...
To find a way to defeat the Devil.
Finally, after some time and a terrible amount of beatings had passed, he had finally managed to crack the first piece of the puzzle before him.