Hatreds are the cinders of affection.

The line suggests that intense hatred often originates in, and is fueled by, prior affection: what remains after love has burned out can still be hot, gritty, and persistent—like cinders after a fire. It implies an emotional continuity between love and hate, emphasizing that the strongest animosities are rarely indifferent; they are frequently the aftereffects of intimacy, loyalty, or admiration turned to disappointment. The metaphor also carries a warning: when affection is damaged rather than extinguished cleanly, it can leave residues that continue to smolder, shaping memory and behavior long after the original relationship has ended.