Ardhanarishvara: the Union of Siva and Shakti

The union of Siva and Shakti resolves duality

Image of Satguru Sivaya Subramuniyaswami
There is no intrinsic evil. God Siva has created the principle of opposites, which are the means for the soul's maturation--beauty and deformity, light and darkness, love and hate, joy and sorrow.
—Gurudeva