Stoic passions are various forms of emotional suffering in Stoicism. A passion is a disturbing and misleading force in the mind which occurs because of a failure to reason correctly. For Chrysippus, a famous Stoic philosopher, the passions are evaluative judgements. A person experiencing such an emotion has incorrectly valued an indifferent thing. A fault of judgement, some false notion of good or evil, lies at the root of each passion.