The Lwas: Marassa:

"Twins are sacred because they are living representations of the balancing forces found throughout Vodou belief. Together, they represent both the human and the divine, the mortal and the immortal. They form a connection between the physical world and the world of the spirits, and they live in both worlds. Some practitioners of Vodou believe that they are even more powerful than the lwa because of the union they symbolise."

The Voudou view of twins makes me think of the Feri Divine Twins.  Like the Divine Twins, Marassa represent opposites.  It is interesting to think of twins as both human and divine, mortal and immortal.  Feri teaches that "self is god and god is self and god is a person like myself."  We are each both human and divine, both mortal and immortal, just like the Voudou twins.  We live in both worlds.  Each one of us is the Divine Twins.

FFF
~Muninn's Kiss