I thought sight unseen was the strongest force in the universe?

I am in a dilemma. I thought that gravity was the strongest force in the universe. Planck however states that the universe is two opposing forces.these forces being light and dark or black and white. When the Physics history books state that Planck proved that
a blackhole eminates blackness. I found myself in a dilemma. It states in the bible that the true power is found in the sight unseen. That led me to believe that gravity is the true force that
holds the universe together.How could this be true if Planck was correct in the universe being two opposing forces? Is reality based in creating the extremes of good and evil, or is it growth of knowledge that can be used for good or for evil? I would like to believe the later but Planck has supposedly proven me wrong.