Franklin criticises the habit of becoming skilled at explaining away failures rather than addressing their causes. A person who repeatedly produces convincing excuses may devote more effort to avoiding responsibility than to developing competence, correcting mistakes or completing the task itself. The contrast is therefore between verbal justification and practical effectiveness.

The statement is deliberately sweeping and does not mean that every explanation for failure is dishonest or that capable people never have legitimate reasons for falling short. Circumstances can genuinely prevent success. Franklin’s broader target is habitual excuse-making: when explanations become a substitute for reflection and corrective action, they can prevent learning and improvement. The maxim therefore presents accountability as an important part of character, suggesting that recognising mistakes and responding constructively to them is generally more useful than becoming accomplished at defending them.