apokatastasis (Greek: ἀποκατάστασις, romanized: apokatástasis, also spelled apocatastasis) is the restoration of creation to a condition of perfection.
In Christianity, the term refers to a form of Christian universalism, often associated with Origen, that includes the ultimate salvation of everyone, including the damned and the Devil.
The New Testament (Acts 3:21), speaks of the "apokatastasis of all things".[6] The dogmatic status of apokatastasis is disputed,[7] and some orthodox fathers such as Gregory of Nyssa taught apokatastasis and were never condemned.[8]
Origen was condemned as a heretic at the Synod of Constantinople of 543. However, it is disputed whether the condemnation was about apokatastasis.[9]
This is similar to the concept of tikkun olam in Hasidic Judaism.
The gnostic Gospel of Philip (likely composed between 180–350 AD) contains the term itself but does not teach universal reconciliation:
There is a rebirth and an image of rebirth. It is certainly necessary to be born again through the image. Which one? Resurrection. The image must rise again through the image. The bridal chamber and the image must enter through the image into the truth: this is the restoration (apokatastasis). Not only must those who produce the name of the Father and the Son and the Holy Spirit, do so, but have produced them for you. If one does not acquire them, the name ("Christian") will also be taken from him.[47]