Hate leaves ugly scars; love leaves beautiful ones.

McLaughlin contrasts the lasting marks left by powerful emotions. “Scars” suggests that both hate and love can wound—each can change a person permanently—but the moral and aesthetic difference lies in what those changes become over time. Hate tends to deform character and memory, leaving bitterness, distrust, and damage that feels disfiguring. Love, even when it hurts or ends, can leave “beautiful” traces: growth, tenderness, gratitude, and a deepened capacity for empathy. The aphorism reframes emotional pain as not merely something to avoid, but something whose value depends on the spirit in which it is endured and remembered.