All life depends upon the opportunistic interplay between elemental forces, the mysterious dualities of the numinous universe. Ying and yang forces of the natural world (lightness and darkness, fire and water, expansion and contraction) create tangible dualities that are complementary, interconnected, and independent. Without the firmament in the midst of the waters, without both sunshine and water, no life forms could subsist on this rocky orb. Without the rich soil surrounded by a canopy of an illimitable sky how could we feed ourselves, how could we breathe?
For grey matter, there is no black and white. If you think in black and white, then you do not use enough brain functions.
It is called equanimity when one has no attachment with the good (the auspicious) and no abhorrence for the bad (the inauspicious). The one without duality is in equanimity-state. In worldly interactions, people identify tolerance as equanimity!
Human life is inherently dualistic. It consists of or is explicable as two fundamental entities, including rivalries between subject and object, mind and matter, and conflict between the benevolent and the malevolent forces. Opposition in the universe creates a dynamic living universe composed of good and evil, body and soul. Human thoughts and feelings are the communal products of the conscious and unconscious mind’s interpretation of a constant flow of coded and symbolic dialogue.