Image courtesy of Ningren
Without darkness, light would have no definition. Without evil, good would never be challenged to expand. Without definition and challenge, there would be no growth. Without growth, our spirits would not evolve.
Many indigenous peoples say the Earth is a schoolhouse and we incarnate here in order to learn. This makes sense only if we view the spirit as separate from the corporeal. If we do, then advancing to higher consciousness and an elevated spiritual plane holds great promise for human transcendence.
The Earth is a bipolar planet. Since all matter converts to energy, we can infer that our lessons will be of a bipolar nature. Darkness and evil are not, in and of themselves, our enemies. When we set up something as the enemy, we constrict and lose all prospect of growth. When we see adversity as our ally, our growth potential expands and accelerates.