Vengeance has been wreaked by a subtle hint from someone's eyes. Darkness has wreaked its vengeance by taking support from light.

This powerful couplet explores the insidious nature of conflict. The first line suggests that enmity can arise from merely ambiguous glances—a subtle gesture that carries immense weight. The second line deepens this idea: even something meant to be a source of light or support can be hijacked by darkness to cause trouble. It's a commentary on how easily trust can be betrayed, making the source of pain almost invisible.