A Sage (Ancient Greek: σοφός, Sophos), in classical philosophy, is someone who has attained Wisdom. The term has also been used interchangeably with a 'good person', and a 'virtuous person'. Sage is one who lives "according to an ideal which transcends the everyday." Philosopher does not have the Wisdom sought, while the Sage does not love or seek wisdom, for it is already possessed.

Apatheia (ἀπάθεια; from a- "without" and pathos "suffering" or "passion"), in Stoicism, refers to a state of mind in which one is not disturbed by the passions. It is best translated by the word Equanimity rather than indifference. The Stoics thought that living virtuously provided freedom from the passions, resulting in Apatheia. The term was later adopted by Plotinus in his development of Neo-Platonism