I have often heard Anu/Padhome called the embodiments of Stasis and Change, Order and Chaos, or IS and IS NOT. While technically true, I think this is simplifying what they really are.
My belief is that every single duality that can be conceived is embodied in Anu/Padhome. Good/Evil, Light/Dark, Order/Chaos, King/Rebel, Logic/Madness, Time/Space, Mind/Soul, Harmony/Strife, Right/Left, Numbers/Letters, Life/Death, etc. Everything can be a duality, if you think about it. Take the Wheel and Tower, symbols often associated with one another. The Wheel represents the shape of the Aurbis, all that is. But the Tower represents I, the individual. Thus there is a duality: the Many/the One.
However, many, if not all, dualities are illusions. There are no clear cut opposites, but a single spectrum. They say the world's not just Black or White, but shades of Grey, but really, they're still all colors, aren't they? (Well, technically combinations and absences of them, but I ain't getting into optics here). One could say this extends to science as well as philosophy, what with wave/particle duality, spacetime and energy-mass equivalence, but that kind of thing I feel is dangerously close to "quantum mysticism" and all that nonsense. In the Aurbis, this even extends to existence/non-existence: CHIM is obtained by surpassing this duality and admitting that you exist but you don't exist. The Tower is just the Wheel from a sideways perspective; the Many are all One. The synthesis caused by the Enantiomorph is probably a metaphor for such unification of opposites.
The Loveletter describes the New Man as 'an individual beyond all AE'. AE being duality, the New Man obtains enlightenment by surpassing it. To him, there is no "Either/Or", there is only "And".
I think this an example of the philosophy of Dialectical Monism, though I'm not sure. I ain't a philosopher, and I only know the term from looking up a few gnostic concepts that writing this reminded me of on WIkipedia. Now, if you excuse me, all this heavy thinking is giving me a headache. Feel free to discuss or rebut these thoughts.