"And ever has it been known that love knows not its own depth until the hour of separation." - Khalil Gibran
The duality is there so we can recognize it. The separation into the yin-yang, the dark and the light, the good and the bad.
While looking at this I also know the dark cannot hold back the light. Open the door to a dark room from the outside at bright noon and the room fills with light. The dark room does not overcome the sun.
May you overcome the world today.
Art by Nicholas Roerich