The notion of apokatastasis (ἀποκατάστασις) is that of restoration or restitution to an original state, from ἀποκαθίστημι, “I restore, reconstitute, return.”

In Greek the term apokatastasis had a variety of applications, from the medical field (somebody’s restoration to health from illness; a displaced limb’s restoration to its proper place) to the military or political (somebody’s restoration to one’s military unit or homeland after expulsion or exile) and especially the astrono…