Phosphorus was an important element for alchemists because it appeared to have the ability to capture light. It represented the spirit, and its symbol is typically a triangle atop a double cross. Alchemists were fascinated by phosphorus because it seemed capable of holding light—the white form of the element oxidizes in air, appearing to glow green in the dark.
Phosphorus represents the spirit, and our ability to glow in the dark. To take something bad and turn it into something amazing. To keep fighting, doesn't matter the resistance.