Speak when you are angry and you will make the best speech you will ever regret.

The aphorism warns that anger sharpens rhetoric while dulling judgment. In the heat of emotion, a person may deliver a “best” speech in the sense of being forceful, clever, or devastatingly effective—yet precisely because it is so effective, it can cause lasting harm: wounded relationships, reputational damage, or irreversible disclosures. The line hinges on irony: what feels like triumphant self-expression becomes a future source of shame. It also implies a practical ethic of restraint—delay speech until passion cools—because words, once spoken, cannot be recalled. The quote’s endurance reflects a common moral insight about temper, self-control, and the asymmetry between momentary satisfaction and long-term consequences.