To recap and review, I give you two trailers for the film. The first is more yin (dark) aspect, covering the destructive side of the movie– the destruction of the mother-wife of Preston’s family, and the destructive side of Preston as Tetragrammaton Cleric, First Class.
As in the Taijitu, there are cross-elements– the more yin-like trailer has yang element, and the more yang-like trailer still has yin.
Where there was destruction and darkness, creation and light fought to break free, and John Preston witnessed that light, sometimes very literally. But Preston had to fight for this light, and as the Angel of Death, he destroyed agents of darkness.
Note that yin (dark) energy is associated with the feminine and the night, while yang (light) energy is associated with the masculine and the day. There is a good summary at Wikipedia. While Kurt Wimmer references Western notions of masculinity and femininity, these Eastern concepts remain, even in the ways he uses white and black colors in the film.
Furthermore, Angus MacFayden (Vice-Counsel Dupont) says in Finding: ‘Equilibrium’ that the story is “almost a Buddhist tale” where good must oppose evil.
Opposition in all things, dear readers.
For it must needs be, that there is an aopposition in all things. If not so, my firstborn in the wilderness, righteousness could not be brought to pass, neither wickedness, neither holiness nor misery, neither good nor bad. Wherefore, all things must needs be a compound in one; wherefore, if it should be one body it must needs remain as dead, having no life neither death, nor corruption nor incorruption, happiness nor misery, neither sense nor insensibility. (2 Nephi, chapter 2, version 27, The Book of Mormon)