Manicheism

— There is, notwithstanding, a sort of Manicheism in genius, as there is the antinomy in science, as there are light and shade in art, as there are opposite and similarly appearing movements in life, as there are diverse and simultaneous springs in the human conscience, as there are attraction and repulsion in the sidereal worlds, as there are multiferous and heterogeneous forces that resolve themselves into astonishing antithetic duality .