For the Epicureans, ataraxia was synonymous with the only true happiness possible for a person. It signifies the detached and balanced state of mind that shows that a person has transcended the material world and is now harvesting all the comforts of philosophy.
For the Pyrrhonians, owing to one's inability to say which sense impressions are true and which ones are false, it is quietude that arises from suspending judgment on dogmatic beliefs or anything non-evident and continuing to inquire.
