There is a method to the madness in the spiritual and religious realms. Just as God ordered the heavens and the earth or the outer realm, so did He order the psyche or inner realm. Understanding the inner dynamics of faith is a science in and of itself.
Grace and Passion are the dual powers of the Divine. They are the forces that create the Holy Grail and the Holy Spear. These two powers are what Zoroaster described as being at war within the soul. When the Taoists speak of balance, it is to these two forces that they are referring.
The best understood is Passion or Divine Feminine. In mystical language, it is referred to as: The blood, The wine, the serpent, the red dragon, Kundalini, Satan. It always moves from the ground up. It is associated with the color red or black. This energy spins to the right, creating the right-handed path.
The other is Grace or Divine Masculine. In mystical language, it is referred to as: The Bread or mana from heaven, water, the semen of God, the unicorn, the white dragon, lighting/Thor & Zeus, Lucifer. It always moves from the sky down. It is always described as being the color white or iridescent. This energy spins to the left, creating the left-handed path.
Both powers can cause either benefit or destruction depending upon the situation and the circumstances.