Franklin uses irony to criticise excessive self-admiration. A person who is entirely absorbed in their own merits may have no “rivals” because others do not share the same exaggerated opinion. The language of romantic love turns vanity into a comic image, suggesting that self-regard can become so strong that it crowds out realistic judgement.

The saying is not a criticism of healthy self-respect. Its target is conceit: an inflated sense of one’s own importance, attractiveness or ability. Excessive self-focus can make a person less receptive to criticism and less attentive to how others see them. Franklin’s broader point is that humility and self-awareness are important correctives to vanity. Confidence can be useful, but it becomes less reliable when it is detached from honest reflection and regard for other people.