Franklin suggests that criticism often hurts most when it contains an element of truth. A reproach that accurately identifies a fault can be difficult to dismiss because it challenges a person’s view of their own conduct. The “sting” therefore comes not simply from hostile words, but from recognising that the criticism may be justified.

The saying does not mean that every painful accusation is true, since false or unfair criticism can also cause distress. Its broader point is that an instinctive reaction to reproach should not replace careful reflection. When criticism feels particularly uncomfortable, it may be worth asking whether it reveals a genuine weakness or mistake. Franklin therefore links self-awareness with the ability to distinguish useful truth from mere insult.