"I am one ... twofold."

Twofoldness appears to be universal with beings.

It seem to be best understood through the ancient Yin-Yang concept,

http://en.wikipedia.org/wiki/Yin_yang

or Alan Watts' ZEN or Carl Jung's Works:

http://publish.uwo.ca/~gcarter2/wattsgame.html

http://www.terebess.hu/english/watts2.html

http://en.wikipedia.org/wiki/Sophia_%28wisdom%29

http://www.jungconference.org/sophia.html

http://www.pistissophia.org/The_Holy_Spirit/the_holy_spirit.html

http://en.wikipedia.org/wiki/Analytical_Psychology