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Wellsprings
ethics

Weakness of Will

ἀκρασία

You know the better course — and take the worse anyway: the ancient puzzle of acting against your own clear judgment.

Akrasia, or weakness of will, is the condition of acting against your own better judgment—knowing what is right but doing what is wrong anyway. Aristotle made this the central puzzle of his ethics. He recognized that people often fail to follow through on what they consciously recognize as best, even when they have the knowledge and ability to do so. This isn't mere ignorance, but a failure of self-mastery where desire or emotion overrides rational conviction.

The problem matters because it challenges the assumption that knowledge alone guarantees virtue. A person might know that excessive pleasure undermines their wellbeing, yet be "overcome by pleasure" and indulge anyway, as Aristotle notes. This gap between knowing what is best and actually doing it reveals something troubling about human nature: understanding the good does not automatically make us act on it. For Aristotle, this meant virtue required not just intellectual grasp but habituation and strength of character to align appetite with reason.

Where this idea shows up

149 Greek sources

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