Apatheia

Apatheia (Greek:ἀπάθεια; from a- "without" and pathos "suffering" or "passion") in Stoic philosophy refers to a state of mind where one is not disturbed by the passions. It is best translated by the word equanimity rather than indifference. The word apatheia has a quite different meaning to the modern English apathy, which has a negative connotation. According to the Stoics, apatheia was the quality that characterized the sage.