Being in a truly fixed state, as opposed to being stable, is not implied in the original Aristotelian usage of this word. He uses the example of "
health" being a
hexis. So according to Aristotle, a "
hexis" is a type of "disposition" (diathesis) which he in turn describes in the same as follows... And specifically it is the type of disposition "in virtue of which (''kath' ho'') the thing which is disposed is disposed well or badly, and either independently or in relation to something else". The wording "in virtue of which" was also described in the same passage... In Aristotle then, a
hexis is an arrangement of parts such that the arrangement might have excellence, being well arranged, or in contrast, might be badly arranged. Also see Aristotle's
Categories viii where a hexis ("habit" in the translation of Edghill) is contrasted with a disposition (
diathesis) in terms of it being more permanent and less easy to change. The example given is "knowledge" (
epistemē). In perhaps the most important case, Aristotle contrasted
hexis with
energeia (in the sense of activity or operation) at
Nicomachean Ethics I.viii.1098b33 and
Eudemian Ethics II.i.1218b. The subject here was
eudaimonia, the proper aim of human life, often translated as "happiness" and
hexis is contrasted with
energeia (ἐνέργεια) in order to show the correctness of a proposed definition of
eudaimonia - "activity (ἐνέργεια) in conformity with virtue" ==Happiness==